Now, one might ask why there are so many philosophers if the ultimate goal of philosophy is one. Undoubtedly the ultimate cause is one—the Supreme Brahman. As Arjuna told Kṛṣṇa in Bhagavad-gītā (10.12):
paraṁ brahma paraṁ dhāma
pavitraṁ paramaṁ bhavān
puruṣaṁ śāśvataṁ divyam
ādi-devam ajaṁ vibhum
"You are the Supreme Brahman, the ultimate, the supreme abode and purifier, the Absolute Truth and the eternal divine person. You are the primal God, transcendental and original, and You are the unborn and all-pervading beauty." Nondevotee speculators, however, do not accept an ultimate cause (sarva-kāraṇa-kāraṇam (Bs. 5.1)). Because they are ignorant and bewildered concerning the soul and its activities, even though some of them have a vague idea of the soul, many controversies arise, and the philosophical speculators can never reach a conclusion.
(Srimad Bhagavatam-------6:4:31------purport).

"One who sees that golden-colored Personality of Godhead, the Supreme Lord, the supreme actor, who is the source of the Supreme Brahman, is liberated."
(4) From Śrīmad-Bhāgavatam (11.5.33–34 and 7.9.38):
dhyeyaṁ sadā paribhava-ghnam abhīṣṭa-dohaṁ
tīrthāspadaṁ śiva-viriñci-nutaṁ śaraṇyam
bhṛtyārti-haṁ praṇata-pāla-bhavābdhi-potaṁ
vande mahā-puruṣa te caraṇāravindam
"We offer our respectful obeisances unto the lotus feet of Him, the Lord, upon whom one should always meditate. He destroys insults to His devotees. He removes the distresses of His devotees and satisfies their desires. He, the abode of all holy places and the shelter of all sages, is worshipable by Lord Śiva and Lord Brahmā. He is the boat of the demigods for crossing the ocean of birth and death."
(Sri Caitanya Caritamrta------1:2:22------purport).

(10) Āśraya: the Transcendence, the summum bonum, from whom everything emanates, upon whom everything rests, and in whom everything merges after annihilation. He is the source and support of all. The āśraya is also called the Supreme Brahman, as in the Vedānta-sūtra (athāto brahma jijñāsā, janmādy asya yataḥ . Śrīmad-Bhāgavatam especially describes this Supreme Brahman as the āśraya. Śrī Kṛṣṇa is this āśraya, and therefore the greatest necessity of life is to study the science of Kṛṣṇa.
Śrīmad-Bhāgavatam accepts Śrī Kṛṣṇa as the shelter of all manifestations because Lord Kṛṣṇa, the Supreme Personality of Godhead, is the ultimate source of everything, the supreme goal of all.
Two different principles are to be considered herein—namely āśraya, the object providing shelter, and āśrita, the dependents requiring shelter. The āśrita exist under the original principle, the āśraya.
(Sri Caitanya Caritamrta------1:2:91-92------purport).

The Pauṣkara-saṁhitā states, "The scriptures that recommend that brāhmaṇas worship the quadruple forms of the Supreme Personality of Godhead are called āgamas (authorized Vedic literatures)." In all Vaiṣṇava literature it is said that worshiping these quadruple forms is as good as worshiping the Supreme Personality of Godhead Vāsudeva, who in His different expansions, complete in six opulences, can accept offerings from His devotees of the results of their prescribed duties. Worshiping the expansions for pastimes, such as Nṛsiṁha, Rāma, Śeṣa and Kūrma, promotes one to the worship of the Saṅkarṣaṇa quadruple. From that position one is raised to the platform of worshiping Vāsudeva, the Supreme Brahman. In the Pauṣkara-saṁhitā it is said, "If one fully worships according to the regulative principles, one can attain the Supreme Personality of Godhead, Vāsudeva." It is to be accepted that Saṅkarṣaṇa, Pradyumna and Aniruddha are as good as Lord Vāsudeva, for They all have inconceivable power and can accept transcendental forms like Vāsudeva.
(Sri Caitanya Caritamrta------1:5:41------purport).

He remains the same person: He is not transformed into everything. One should accept that the Lord has inconceivable energies and that it is by His order and will that varieties of manifestations have come into existence. In the Vedic literature it is said, sa-tattvato ’nyathā-buddhir vikāra ity udāhṛtaḥ. This mantra indicates that from one fact another fact is generated. For example, a father is one fact, and a son generated from the father is a second fact. Thus both of them are truths, although one is generated from the other. This generation of a second, independent truth from a first truth is called vikāra, or transformation resulting in a by-product. The Supreme Brahman is the Absolute Truth, and the energies that have emanated from Him and are existing separately, such as the living entities and the cosmic manifestation, are also truths. This is an example of transformation, which is called vikāra or pariṇāma. To give another example of vikāra, milk is a truth, but the same milk may be transformed into yogurt. Thus yogurt is a transformation of milk, although the ingredients of yogurt and milk are the same.
(Sri Caitanya Caritamrta------1:7:121------purport).

Śrī Brahmānanda Purī was one of the associates of Śrī Caitanya Mahāprabhu while He was performing kīrtana in Navadvīpa, and he also joined Lord Caitanya in Jagannātha Purī. We may note in this connection that the name Brahmānanda is accepted not only by Māyāvādī sannyāsīs but by Vaiṣṇava sannyāsīs also. One of our foolish Godbrothers criticized our sannyāsī Brahmānanda Svāmī, saying that this was a Māyāvādī name. The foolish man did not know that Brahmānanda does not always refer to the impersonal Brahman. Para-brahman, the Supreme Brahman, is Kṛṣṇa. A devotee of Kṛṣṇa can therefore also be called Brahmānanda; this is evident from the fact that Brahmānanda Purī was one of the chief sannyāsī associates of Lord Caitanya Mahāprabhu.
Brahmānanda Bhāratī: Brahmānanda Bhāratī went to see Śrī Kṛṣṇa Caitanya Mahāprabhu at Jagannātha-dhāma. At that time he used to wear only a deerskin to cover himself, and Śrī Caitanya Mahāprabhu indirectly indicated that He did not like this deerskin covering. Brahmānanda Bhāratī therefore gave it up and accepted a loincloth of saffron color, as used by Vaiṣṇava sannyāsīs. For some time he lived with Śrī Caitanya Mahāprabhu at Jagannātha Purī.
(Sri Caitanya Caritamrta------1:9:13-15------purport).

According to the living entity's desires, he is wandering from one body to another and from one planet to another, under the direction of the Supreme Personality of Godhead, Paramātmā. However, when the living entity comes to his senses by the mercy of the Lord, he is awarded devotional service. Thus he is saved from the clutches of māyā. At such a time he can see his eternal friend, the Supreme Personality of Godhead, and become free from all lamentation and hankering. This is confirmed in the Bhagavad-gītā (18.54), where the Lord says, brahma-bhūtaḥ prasannātmā na śocati na kāṅkṣati: "One who is thus transcendentally situated at once realizes the Supreme Brahman and becomes fully joyful. He never laments or desires to have anything." Thus it is definitely proved that the Supreme Personality of Godhead is the master of all potencies and that the living entities are always subjected to these potencies. That is the difference between māyādhīśa and māyā-vaśa.
(Sri Caitanya Caritamrta------2:6:162------purport).

The Vedas enjoin, sarvaṁ khalv idaṁ brahma: everything is the energy of the Supreme Personality of Godhead, the Supreme Brahman or Parambrahma. Parasya brahmaṇaḥ śaktis tathedam akhilaṁ jagat: everything is a manifestation of the energy of the Supreme Brahman. Since the energy and energetic are identical, actually everything is Kṛṣṇa, Parambrahma. In the Bhagavad-gītā (9.4) Lord Kṛṣṇa confirms this:
mayā tatam idaṁ sarvaṁ jagad avyakta-mūrtinā
mat-sthāni sarva-bhūtāni na cāhaṁ teṣv avasthitaḥ
"By Me, in My unmanifested form, this entire universe is pervaded. All beings are in Me, but I am not in them."
Kṛṣṇa is spread throughout the whole universe in His impersonal form. Since everything is a manifestation of the Lord's energy, the Lord can manifest Himself through any energy. In this age, the Lord is manifest through wood as Lord Jagannātha, and He is manifest through water as the river Ganges. Therefore Śrī Caitanya Mahāprabhu ordered the two brothers—Sārvabhauma Bhaṭṭācārya and Vidyā-vācaspati—to worship Lord Jagannātha and the river Ganges.
(Sri Caitanya Caritamrta------2:15:135------purport).

Brahman ultimately refers to the Personality of Godhead. Impersonal Brahman realization is just the negative conception of the mundane creations. Paramātmā is the localized aspect of Brahman within all kinds of material bodies. Ultimately theSupreme Brahman realization is the realization of the Personality of Godhead. Lord Śrī Kṛṣṇa is that Supreme Personality of Godhead according to all evidence of the revealed scriptures. He is the ultimate source of viṣṇu-tattvas.
(Srimad Bhagavatam------introduction).

That is the secret of spiritual success. We should not try to lord it over the material nature, nor should we reject material things. The best way to make the best use of a bad bargain is to use everything in relation with the supreme spiritual being. Everything is an emanation from the Supreme Spirit, and by His inconceivable power He can convert spirit into matter and matter into spirit. Therefore a material thing (so-called) is at once turned into a spiritual force by the great will of the Lord. The necessary condition for such a change is to employ so-called matter in the service of the spirit. That is the way to treat our material diseases and elevate ourselves to the spiritual plane where there is no misery, no lamentation and no fear. When everything is thus employed in the service of the Lord, we can experience that there is nothing except the Supreme Brahman. The Vedic mantra that "everything is Brahman" is thus realized by us.
(Srimad Bhagavatam-------1:5:33------purport).

The Lord is the all-prevailing Supersoul of all existence, and yet He appears in the form of a boar amongst the animals, in the form of a human being as Rāma, Kṛṣṇa, etc., in the form of a ṛṣi like Nārāyaṇa, and in the form of an aquatic like a fish. Yet it is said that He is unborn, and He has nothing to do. In the śruti mantra it is said that the Supreme Brahman has nothing to do. No one is equal to or greater than Him. He has manifold energies, and everything is performed by Him perfectly by automatic knowledge, strength and activity. All these statements prove without any question that the Lord's activities, forms and deeds are all inconceivable to our limited thinking power, and because He is inconceivably powerful, everything is possible in Him. Therefore no one can calculate Him exactly; every action of the Lord is bewildering to the common man. He cannot be understood by the Vedic knowledge, but He can be easily understood by the pure devotees because they are intimately related with Him. The devotees therefore know that although He appears amongst the animals, He is not an animal, nor a man, nor a ṛṣi, nor a fish. He is eternally the Supreme Lord, in all circumstances.
(Srimad Bhagavatam-------1:8:30------purport).

When one is thus inclined to become an associate of the Supreme Lord, the Personality of Godhead, in one of the innumerable planets of the spiritual sky, especially in Goloka Vṛndāvana, one has to think always that he is different from the material energy; he has nothing to do with it, and he has to realize himself as pure spirit, Brahman, qualitatively equal with the Supreme Brahman (Parameśvara). Mahārāja Yudhiṣṭhira, after distributing his kingdom to Parīkṣit and Vajra, did not think himself Emperor of the world or head of the Kuru dynasty. This sense of freedom from material relations, as well as freedom from the material encagement of the gross and subtle encirclement, makes one free to act as the servitor of the Lord, even though one is in the material world. This stage is called the jīvan-mukta stage, or the liberated stage, even in the material world. That is the process of ending material existence. One must not only think that he is Brahman, but must act like Brahman. One who only thinks himself Brahman is an impersonalist. And one who acts like Brahman is the pure devotee.
(Srimad Bhagavatam-------1:15:42------purport).

The supreme enjoyer, the Personality of Godhead, is the Supreme Brahman or the summum bonum because of His being the supreme cause of all causes. The conception of impersonal Brahman realization is the first step, due to His distinction from the illusory conception of material existence. In other words, impersonal Brahman is a feature of the Absolute distinct from the material variegatedness, just as light is a conception distinct from its counterpart, darkness. But the light has its variegatedness, which is seen by those who further advance in the light, and thus the ultimate realization of Brahman is the source of the Brahman light, the Supreme Personality of Godhead, the summum bonum or the ultimate source of everything. Therefore, meeting the Personality of Godhead includes the realization of the impersonal Brahman as realized at first in contrast with material inebriety. The Personality of Godhead is the third step of Brahman realization. As explained in the First Canto, one must understand all three features of the Absolute—Brahman, Paramātmā and Bhagavān.
(Srimad Bhagavatam-------2:7:47------purport).

Although Paramātmā and Brahman are subordinate to Bhagavān, because Bhagavān is Puruṣottama or the Superperson, He is the source of the Supersoul also. In the Bhagavad-gītā (15.18) Lord Kṛṣṇa says that He is the Puruṣottama and the source of everything, and thus it is concluded that Śrī Kṛṣṇa is the ultimate source and shelter of all entities, including the Supersoul and Supreme Brahman. Even accepting that there is no difference between the Supersoul and the individual soul, the individual soul is dependent on the Supersoul for being liberated from the illusion of material energy. The individual is under the clutches of illusory energy, and therefore although qualitatively one with the Supersoul, he is under the illusion of identifying himself with matter. And to get out of this illusory conception of factual life, the individual soul has to depend on the Supersoul to be recognized as one with Him. In that sense also the Supersoul is the supreme shelter. And there is no doubt about it.
(Srimad Bhagavatam-------2:10:9------purport).

The solution is that the Lord has nothing to do with anything mundane. All His activities are transcendental. This cannot be understood by the mundane speculators. For the mundane speculators there is certainly a kind of bewilderment, but for the transcendental devotees there is nothing astonishing in this. The Brahman conception of the Absolute Truth is certainly the negation of all mundane activities, but the Para-brahman conception is full with transcendental activities. One who knows the distinctions between the conception of Brahman and the conception of Supreme Brahman is certainly the real transcendentalist. There is no bewilderment for such transcendentalists. The Lord Himself also declares in Bhagavad-gītā (10.2), "Even the great sages and demigods can know hardly anything about My activities and transcendental potencies."
(Srimad Bhagavatam-------3:4:16------purport).

Although life is sustained by the sun, life is also disturbed by darkness and snowfall produced by the sun. But it is also a fact that the sun itself is never overcome by darkness, clouds or snowfall; the sun is far, far away from such disturbances. Only those who have a poor fund of knowledge say that the sun is covered by a cloud or by darkness. Similarly, the Supreme Brahman, or the Para-brahman, the Personality of Godhead, is always unaffected by the influence of the material energy, although it is one of His energies (parāsya śaktir vividhaiva śrūyate (Cc. Madhya 13.65, purport)).
There is no reason to assert that the Supreme Brahman is overpowered by the illusory energy. The clouds, darkness and snowfall can cover only a very insignificant portion of the sun's rays. Similarly, the modes of material nature may react upon the raylike living entities. It is the misfortune of the living entity, certainly not without reason, that the influence of the material energy acts on his pure consciousness and eternal bliss. This covering up of pure consciousness and eternal bliss is due to avidyā-karmā-saṁjñā, the energy which acts on the infinitesimal living entities who misuse their minute independence.
(Srimad Bhagavatam-------3:7:9------purport).

Simply by fixing oneself in Kṛṣṇa consciousness, engaging the senses in the service of the Lord, one is imperceptibly liberated. This is also confirmed in Bhagavad-gītā. Simply by discharging uncontaminated devotional service as prescribed in the scriptures, one becomes equal to Brahman. In Bhagavad-gītā it is said, brahma-bhūyāya kalpate (BG 14.26) This means that the living entity in his original state is Brahman because he is part and parcel of the Supreme Brahman. But simply because of his forgetfulness of his real nature as an eternal servitor of the Lord, he is overwhelmed and captured by māyā. His forgetfulness of his real constitutional position is māyā. Otherwise he is eternally Brahman.
(Srimad Bhagavatam-------3:25:36------purport).

In spite of executing all kinds of austerities and penances or even arriving at the brink of spiritual realization in Brahman realization, they think that they are in the effulgence of Brahman, but actually, because they have no transcendental activities, they fall down to material activities." One should not be satisfied simply with knowing that one is Brahman. He must engage himself in the service of the Supreme Brahman; that is bhakti. The engagement of Brahman should be the service of Para-brahman. It is said that unless one becomes Brahman one cannot serve Brahman. The Supreme Brahman is the Supreme Personality of Godhead, and the living entity is also Brahman. Without realization that he is Brahman, spirit soul, an eternal servitor of the Lord, if one simply thinks that he is Brahman, his realization is only theoretical. He has to realize and at the same time engage himself in the devotional service of the Lord; then he can exist in the Brahman status. Otherwise he falls down.
(Srimad Bhagavatam-------3:25:41------purport).

There are two energies—material and spiritual—and both originally come from Kṛṣṇa. Kṛṣṇa is the supreme living being. Although it may be said that in the material world a living force is generated from matter, it must be admitted that originally matter is generated from the supreme living being. Nityo nityānāṁ cetanaś cetanānām (Kaṭha Upaniṣad 2.2.13). The conclusion is that everything, both material and spiritual, is generated from the Supreme Being. From the evolutionary point of view, perfection is reached when the living entity attains the platform of a brāhmaṇa. A brāhmaṇa is a worshiper of the Supreme Brahman, and the Supreme Brahman worships the brāhmaṇa. In other words, the devotee is subordinate to the Supreme Lord, and the Lord is inclined to see to the satisfaction of His devotee. A brāhmaṇa is called dvija-deva, and the Lord is called dvija-deva-deva. He is the Lord of brāhmaṇas.
(Srimad Bhagavatam-------5:5:21-22------purport).

In the Brahma-sūtra it is said: tad-ananyatvam ārabhambhaṇa-śabdādibhyaḥ (2.1.14). This cosmic manifestation is a mixture of matter and spirit, but the cause is theSupreme Brahman, the Supreme Personality of Godhead. Therefore in Śrīmad-Bhāgavatam (1.5.20) it is said: idaṁ hi viśvaṁ bhagavān ivetaraḥ. The entire cosmic manifestation is but a transformation of the energy of the Supreme Personality of Godhead, but because of illusion, no one can appreciate that God is nondifferent from the material world. Actually He is not different, but this material world is simply a transformation of His different energies; parāsya śaktir vividhaiva śrūyate (Cc. Madhya 13.65, purport). There are also other versions of this in the Vedas: sarvaṁ khalv idaṁ brahma. Matter and spirit are all nondifferent from the Supreme Brahman, Bhagavān. Lord Śrī Kṛṣṇa confirms this statement in the Bhagavad-gītā (7.4): me bhinnā prakṛtir aṣṭadhā. The material energy is Kṛṣṇa's energy, but it is separated from Him.
(Srimad Bhagavatam-------5:12:8------purport).

"One who is thus transcendentally situated realizes the Supreme Brahman and becomes fully joyful. He never laments or desires to have anything; he is equally disposed to every living entity. In that state he attains pure devotional service unto Me." Devotional service is actual liberation. When one is attracted by the beauty of the Supreme Personality of Godhead and his mind is always engaged at the Lord's lotus feet, he is no longer interested in subjects that do not help him in self-realization. In other words, he loses all attraction for material activities. In the Taittirīya Upaniṣad (2.7) it is said: eṣa hy evānandayati. yadā hy evaiṣa etasmin na dṛśye 'nātmye anirukte 'nilayane 'bhayaṁ pratiṣṭhāṁ vindate 'tha so 'bhayaṁ gato bhavati. A living entity becomes established in spiritual, blissful life when he fully understands that his happiness depends on spiritual self-realization, which is the basic principle of ānanda (bliss), and when he is eternally situated in the service of the Lord, who has no other lord above Him.
(Srimad Bhagavatam-------5:19:20------purport).

"Kṛṣṇa, who is known as Govinda, is the supreme controller. He has an eternal, blissful, spiritual body. He is the origin of all. He has no other origin, for He is the prime cause of all causes." The Supreme Brahman (tad brahma) is the cause of all causes, but He has no cause. Anādir ādir govindaḥ sarva-kāraṇa-kāraṇam: (Bs. 5.1) Govinda, Kṛṣṇa, is the original cause of all causes, but He has no cause for His appearance as Govinda. Govinda expands in multifarious forms, but nevertheless they are one. As confirmed by Madhvācārya, ananyaḥ sadṛśābhāvād eko rūpādy-abhedataḥ: Kṛṣṇa has no cause nor any equal, and He is one because His various forms, as svāṁśa and vibhinnāṁśa, are nondifferent from Himself.
(Srimad Bhagavatam-------6:4:30------purport).

This is the all-pervasive conception of the Supreme Personality of Godhead, which explains how He spreads everywhere and anywhere. Sarvaṁ khalv idaṁ brahma: everything is Brahman—the Supreme Brahman, Kṛṣṇa. Nothing exists without Him. As the Lord says in Bhagavad-gītā (9.4):
mayā tatam idaṁ sarvaṁ
jagad avyakta-mūrtinā
mat-sthāni sarva-bhūtāni
na cāhaṁ teṣv avasthitaḥ
"I exist everywhere, and everything exists in Me, yet I am not visible everywhere." The Lord can be visible only through devotional service. Tatra tiṣṭhāmi nārada yatra gāyanti mad-bhaktāḥ: the Supreme Lord stays only where His devotees chant His glories.
(Srimad Bhagavatam-------7:9:48------purport).