Brahman is more explicitly explained in the Brahma-sūtra to be like the rays of the sunshine. The impersonal Brahman is the shining rays of the Supreme Personality of Godhead. Impersonal Brahman is incomplete realization of the absolute whole, and so also is the conception of Paramātmā. In the Fifteenth Chapter it shall be seen that the Supreme Personality of Godhead, Puruṣottama, is above both impersonal Brahman and the partial realization of Paramātmā. The Supreme Personality of Godhead is called sac-cid-ānanda-vigraha. The Brahma-saṁhitā begins in this way: īśvaraḥ paramaḥ kṛṣṇaḥ sac-cid-ānanda-vigrahaḥ/ anādir ādir govindaḥ sarva-kāraṇa-kāraṇam. "Govinda, Kṛṣṇa, is the cause of all causes. He is the primal cause, and He is the very form of eternity, knowledge and bliss." Impersonal Brahman realization is the realization of His sat (eternity) feature. Paramātmā realization is the realization of sat-cit (eternal knowledge). But realization of the Personality of Godhead, Kṛṣṇa, is realization of all the transcendental features: sat, cit and ānanda (eternity, knowledge, and bliss) in complete vigraha (form).
(Bhagavad-Gita-----introduction).

This verse gives a description of that eternal sky. Of course we have a material conception of the sky, and we think of it in relationship to the sun, moon, stars and so on, but in this verse the Lord states that in the eternal sky there is no need for the sun nor for the moon nor electricity or fire of any kind because the spiritual sky is already illuminated by the brahmajyoti, the rays emanating from the Supreme Lord. We are trying with difficulty to reach other planets, but it is not difficult to understand the abode of the Supreme Lord. This abode is referred to as Goloka. In the Brahma-saṁhitā (5.37) it is beautifully described: goloka eva nivasaty akhilātma-bhūtaḥ. The Lord resides eternally in His abode Goloka, yet He can be approached from this world, and to this end the Lord comes to manifest His real form, sac-cid-ānanda-vigraha (Bs. 5.1). When He manifests this form, there is no need for our imagining what He looks like. To discourage such imaginative speculation, He descends and exhibits Himself as He is, as Śyāmasundara. Unfortunately, the less intelligent deride Him because He comes as one of us and plays with us as a human being. But because of this we should not consider the Lord one of us. It is by His omnipotency that He presents Himself in His real form before us and displays His pastimes, which are replicas of those pastimes found in His abode.
(Bhagavad-Gita-----introduction).

There are many persons who are very rich, very powerful, very beautiful, very famous, very learned, and very much detached, but no one can claim that he possesses all riches, all strength, etc., entirely. Only Kṛṣṇa can claim this because He is the Supreme Personality of Godhead. No living entity, including Brahmā, Lord Śiva, or Nārāyaṇa, can possess opulences as fully as Kṛṣṇa. Therefore it is concluded in the Brahma-saṁhitā by Lord Brahmā himself that Lord Kṛṣṇa is the Supreme Personality of Godhead. No one is equal to or above Him.
(Bhagavad-Gita-----2:2------purport).

The devotees of the Supreme Lord, or the persons who are in Kṛṣṇa consciousness, are called santas, and they are always in love with the Lord as it is described in theBrahma-saṁhitā (5.38): premāñjana-cchurita-bhakti-vilocanena santaḥ sadaiva hṛdayeṣu vilokayanti. The santas, being always in a compact of love with the Supreme Personality of Godhead, Govinda (the giver of all pleasures), or Mukunda (the giver of liberation), or Kṛṣṇa (the all-attractive person), cannot accept anything without first offering it to the Supreme Person. Therefore, such devotees always perform yajñas in different modes of devotional service, such as śravaṇam, kīrtanam, smaraṇam, arcanam (S.B.7:5:23), etc., and these performances of yajñas keep them always aloof from all kinds of contamination of sinful association in the material world. Others, who prepare food for self or sense gratification, are not only thieves but also the eaters of all kinds of sins. How can a person be happy if he is both a thief and sinful? It is not possible.
(Bhagavad-Gita-----3:13------purport).

As one has to work in ordinary life by the direction of the state, one similarly has to work under direction of the supreme state of the Lord. Such directions in the Vedas are directly manifested from the breathing of the Supreme Personality of Godhead. It is said, asya mahato bhūtasya niśvasitam etad yad ṛg-vedo yajur-vedaḥ sāmavedo 'tharvāṅgirasaḥ. "The four Vedas-namely the Ṛg Veda, Yajur Veda, Sāma Veda, and Atharva Veda—are all emanations from the breathing of the great Personality of Godhead." (Bṛhad-āraṇyaka Upaniṣad 4.5.11) The Lord, being omnipotent, can speak by breathing air, for as it is confirmed in the Brahma-saṁhitā, the Lord has the omnipotence to perform through each of His senses the actions of all other senses. In other words, the Lord can speak through His breathing, and He can impregnate by His eyes. In fact, it is said that He glanced over material nature and thus fathered all living entities. After creating or impregnating the conditioned souls into the womb of material nature, He gave His directions in the Vedic wisdom as to how such conditioned souls can return home, back to Godhead. We should always remember that the conditioned souls in material nature are all eager for material enjoyment.
(Bhagavad-Gita-----3:15------purport).

In this millennium, the sun-god is known as Vivasvān, the king of the sun, which is the origin of all planets within the solar system. In the Brahma-saṁhitā (5.52) it is stated:
yac-cakṣur eṣa savitā sakala-grahāṇāṁ
rājā samasta-sura-mūrtir aśeṣa-tejāḥ
yasyājñayā bhramati sambhṛta-kāla-cakro
govindam ādi-puruṣaṁ tam ahaṁ bhajāmi
"Let me worship," Lord Brahmā said, "the Supreme Personality of Godhead, Govinda (Kṛṣṇa), who is the original person and under whose order the sun, which is the king of all planets, is assuming immense power and heat. The sun represents the eye of the Lord and traverses its orbit in obedience to His order."
(Bhagavad-Gita-----4:1------purport).

In the Brahma-saṁhitā (5.33) we have information of many, many incarnations of the Lord. It is stated there:
advaitam acyutam anādim ananta-rūpam
ādyaṁ purāṇa-puruṣaṁ nava-yauvanaṁ ca
vedeṣu durlabham adurlabham ātma-bhaktau
govindam ādi-puruṣaṁ tam ahaṁ bhajāmi
"I worship the Supreme Personality of Godhead, Govinda (Kṛṣṇa), who is the original person—absolute, infallible, without beginning. Although expanded into unlimited forms, He is still the same original, the oldest, and the person always appearing as a fresh youth. Such eternal, blissful, all-knowing forms of the Lord are usually not understood by even the best Vedic scholars, but they are always manifest to pure, unalloyed devotees."
(Bhagavad-Gita-----4:5------purport).

It is also stated in Brahma-saṁhitā (5.39):
rāmādi-mūrtiṣu kalā-niyamena tiṣṭhan
nānāvatāram akarod bhuvaneṣu kintu
kṛṣṇaḥ svayaṁ samabhavat paramaḥ pumān yo
govindam ādi-puruṣaṁ tam ahaṁ bhajāmi
"I worship the Supreme Personality of Godhead, Govinda (Kṛṣṇa), who is always situated in various incarnations such as Rāma, Nṛsiṁha and many subincarnations as well, but who is the original Personality of Godhead known as Kṛṣṇa, and who incarnates personally also."
(Bhagavad-Gita-----4:5------purport).

Although Arjuna is addressed herein as the mighty hero who could subdue the enemies, he is unable to recall what had happened in his various past births. Therefore, a living entity, however great he may be in the material estimation, can never equal the Supreme Lord. Anyone who is a constant companion of the Lord is certainly a liberated person, but he cannot be equal to the Lord. The Lord is described in the Brahma-saṁhitā as infallible (acyuta), which means that He never forgets Himself, even though He is in material contact. Therefore, the Lord and the living entity can never be equal in all respects, even if the living entity is as liberated as Arjuna. Although Arjuna is a devotee of the Lord, he sometimes forgets the nature of the Lord, but by the divine grace a devotee can at once understand the infallible condition of the Lord, whereas a nondevotee or a demon cannot understand this transcendental nature. Consequently these descriptions in the Gītā cannot be understood by demonic brains. Kṛṣṇa remembered acts which were performed by Him millions of years before, but Arjuna could not, despite the fact that both Kṛṣṇa and Arjuna are eternal in nature. We may also note herein that a living entity forgets everything due to his change of body, but the Lord remembers because He does not change His sac-cid-ānanda body. He is advaita, which means there is no distinction between His body and Himself.
(Bhagavad-Gita-----4:5------purport).

Even then, the liberation they achieve—merging into the impersonal brahmajyoti of the Lord—is only partial, and there is the risk of returning to this material world. But the devotee, simply by understanding the transcendental nature of the body and activities of the Lord, attains the abode of the Lord after ending this body and does not run the risk of returning to this material world. In the Brahma-saṁhitā (5.33) it is stated that the Lord has many, many forms and incarnations: advaitam acyutam anādim ananta-rūpam. Although there are many transcendental forms of the Lord, they are still one and the same Supreme Personality of Godhead. One has to understand this fact with conviction, although it is incomprehensible to mundane scholars and empiric philosophers.
(Bhagavad-Gita-----4:9------purport).

The result of receiving knowledge from a self-realized soul, or one who knows things as they are, is learning that all living beings are parts and parcels of the Supreme Personality of Godhead, Lord Śrī Kṛṣṇa. The sense of an existence separate from Kṛṣṇa is called māyā (mā-not, yā-this). Some think that we have nothing to do with Kṛṣṇa, that Kṛṣṇa is only a great historical personality and that the Absolute is the impersonal Brahman. Factually, as it is stated in the Bhagavad-gītā, this impersonal Brahman is the personal effulgence of Kṛṣṇa. Kṛṣṇa, as the Supreme Personality of Godhead, is the cause of everything. In the Brahma-saṁhitā it is clearly stated that Kṛṣṇa is the Supreme Personality of Godhead, the cause of all causes. Even the millions of incarnations are only His different expansions. Similarly, the living entities are also expansions of Kṛṣṇa. The Māyāvādī philosophers wrongly think that Kṛṣṇa loses His own separate existence in His many expansions. This thought is material in nature. We have experience in the material world that a thing, when fragmentally distributed, loses its own original identity. But the Māyāvādī philosophers fail to understand that absolute means that one plus one is equal to one, and that one minus one is also equal to one. This is the case in the absolute world.
(Bhagavad-Gita-----4:35------purport).

A consummate yogī, who is perfect in understanding Lord Kṛṣṇa, as is clearly stated herein by the Lord Himself (mat-cittaḥ, mat-paraḥ, mat-sthānam), can attain real peace and can ultimately reach His supreme abode, Kṛṣṇaloka, known as Goloka Vṛndāvana. In the Brahma-saṁhitā (5.37) it is clearly stated, goloka eva nivasaty akhilātma-bhūtaḥ: the Lord, although residing always in His abode called Goloka, is the all-pervading Brahman and the localized Paramātmā as well by dint of His superior spiritual energies. No one can reach the spiritual sky (Vaikuṇṭha) or enter into the Lord's eternal abode (Goloka Vṛndāvana) without the proper understanding of Kṛṣṇa and His plenary expansion Viṣṇu. Therefore a person working in Kṛṣṇa consciousness is the perfect yogī, because his mind is always absorbed in Kṛṣṇa's activities (sa vai manaḥ kṛṣṇa-pādāravindayoḥ (S.B.9:4:18).
(Bhagavad-Gita-----6:15------purport).

A person in Kṛṣṇa consciousness certainly sees Lord Kṛṣṇa everywhere, and he sees everything in Kṛṣṇa. Such a person may appear to see all separate manifestations of the material nature, but in each and every instance he is conscious of Kṛṣṇa, knowing that everything is a manifestation of Kṛṣṇa's energy. Nothing can exist without Kṛṣṇa, and Kṛṣṇa is the Lord of everything—this is the basic principle of Kṛṣṇa consciousness. Kṛṣṇa consciousness is the development of love of Kṛṣṇa—a position transcendental even to material liberation. At this stage of Kṛṣṇa consciousness, beyond self-realization, the devotee becomes one with Kṛṣṇa in the sense that Kṛṣṇa becomes everything for the devotee and the devotee becomes full in loving Kṛṣṇa. An intimate relationship between the Lord and the devotee then exists. In that stage, the living entity can never be annihilated, nor is the Personality of Godhead ever out of the sight of the devotee. To merge in Kṛṣṇa is spiritual annihilation. A devotee takes no such risk. It is stated in the Brahma-saṁhitā (5.38):
premāñjana-cchurita-bhakti-vilocanena
santaḥ sadaiva hṛdayeṣu vilokayanti
yaṁ śyāmasundaram acintya-guṇa-svarūpaṁ
govindam ādi-puruṣaṁ tam ahaṁ bhajāmi
"I worship the primeval Lord, Govinda, who is always seen by the devotee whose eyes are anointed with the pulp of love. He is seen in His eternal form of Śyāmasundara, situated within the heart of the devotee."
(Bhagavad-Gita-----6:30------purport).