The brāhmaṇa and the outcaste may be different from the social point of view, or a dog, a cow, and an elephant may be different from the point of view of species, but these differences of body are meaningless from the viewpoint of a learned transcendentalist. This is due to their relationship to the Supreme, for the Supreme Lord, by His plenary portion as Paramātmā, is present in everyone's heart. Such an understanding of the Supreme is real knowledge. As far as the bodies are concerned in different castes or different species of life, the Lord is equally kind to everyone because He treats every living being as a friend yet maintains Himself as Paramātmā regardless of the circumstances of the living entities. The Lord as Paramātmā is present both in the outcaste and in the brāhmaṇa, although the body of a brāhmaṇa and that of an outcaste are not the same.
(Srimad Bhagavatam-----5:18-----purport).

The bodies are material productions of different modes of material nature, but the soul and the Supersoul within the body are of the same spiritual quality. The similarity in the quality of the soul and the Supersoul, however, does not make them equal in quantity, for the individual soul is present only in that particular body whereas the Paramātmā is present in each and every body. A Kṛṣṇa conscious person has full knowledge of this, and therefore he is truly learned and has equal vision. The similar characteristics of the soul and Supersoul are that they are both conscious, eternal and blissful. But the difference is that the individual soul is conscious within the limited jurisdiction of the body whereas the Supersoul is conscious of all bodies. The Supersoul is present in all bodies without distinction.
(Srimad Bhagavatam-----5:18-----purport).

The constitutional position of the living entity is to carry out the order of the superior. As long as one's mind remains an unconquered enemy, one has to serve the dictations of lust, anger, avarice, illusion, etc. But when the mind is conquered, one voluntarily agrees to abide by the dictation of the Personality of Godhead, who is situated within the heart of everyone as Paramātmā. Real yoga practice entails meeting the Paramātmā within the heart and then following His dictation. For one who takes to Kṛṣṇa consciousness directly, perfect surrender to the dictation of the Lord follows automatically.
(Srimad Bhagavatam-----6:6-----purport).

Actually, every living entity is intended to abide by the dictation of the Supreme Personality of Godhead, who is seated in everyone's heart as Paramātmā. When the mind is misled by the external, illusory energy, one becomes entangled in material activities. Therefore, as soon as one's mind is controlled through one of the yoga systems, one should be considered to have already reached the destination. One has to abide by superior dictation. When one's mind is fixed on the superior nature, he has no alternative but to follow the dictation of the Supreme. The mind must admit some superior dictation and follow it. The effect of controlling the mind is that one automatically follows the dictation of the Paramātmā, or Supersoul. Because this transcendental position is at once achieved by one who is in Kṛṣṇa consciousness, the devotee of the Lord is unaffected by the dualities of material existence, namely distress and happiness, cold and heat, etc. This state is practical samādhi, or absorption in the Supreme.
(Srimad Bhagavatam-----6:7-----purport).

Kṛṣṇa is realized in different degrees as Brahman, Paramātmā and the Supreme Personality of Godhead. Kṛṣṇa consciousness means, concisely, to be always engaged in the transcendental loving service of the Lord. But those who are attached to the impersonal Brahman or the localized Supersoul are also partially Kṛṣṇa conscious, because the impersonal Brahman is the spiritual ray of Kṛṣṇa and the Supersoul is the all-pervading partial expansion of Kṛṣṇa. Thus the impersonalist and the meditator are also indirectly Kṛṣṇa conscious. A directly Kṛṣṇa conscious person is the topmost transcendentalist because such a devotee knows what is meant by Brahman and Paramātmā. His knowledge of the Absolute Truth is perfect, whereas the impersonalist and the meditative yogī are imperfectly Kṛṣṇa conscious.
(Srimad Bhagavatam-----6:10-----purport).

The goal of life is to know Kṛṣṇa, who is situated within the heart of every living being as Paramātmā, the four-handed Viṣṇu form. The yoga process is practiced in order to discover and see this localized form of Viṣṇu, and not for any other purpose. The localized viṣṇu-mūrti is the plenary representation of Kṛṣṇa dwelling within one's heart. One who has no program to realize this viṣṇu-mūrti is uselessly engaged in mock yoga practice and is certainly wasting his time. Kṛṣṇa is the ultimate goal of life, and the viṣṇu-mūrti situated in one's heart is the object of yoga practice.
(Srimad Bhagavatam-----6:13-14-----purport).

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.
(Srimad Bhagavatam-----6:15-----purport).

A Kṛṣṇa conscious yogī is the perfect seer because he sees Kṛṣṇa, the Supreme, situated in everyone's heart as Supersoul (Paramātmā). Īśvaraḥ sarva-bhūtānāṁ hṛd-deśe 'rjuna tiṣṭhati. The Lord in His Paramātmā feature is situated within both the heart of the dog and that of a brāhmaṇa. The perfect yogī knows that the Lord is eternally transcendental and is not materially affected by His presence in either a dog or a brāhmaṇa. That is the supreme neutrality of the Lord. The individual soul is also situated in the individual heart, but he is not present in all hearts. That is the distinction between the individual soul and the Supersoul.
(Srimad Bhagavatam-----6:29-----purport).

In complete Kṛṣṇa consciousness one knows that Kṛṣṇa is ultimate knowledge beyond any doubts. Different types of yoga are only steppingstones on the path of Kṛṣṇa consciousness. One who takes directly to Kṛṣṇa consciousness automatically knows about brahma-jyotir and Paramātmā in full. By practice of Kṛṣṇa consciousness yoga, one can know everything in full—namely the Absolute Truth, the living entities, the material nature, and their manifestations with paraphernalia.
(Srimad Bhagavatam-----7:1-----purport).

It is not possible for the Brahman-realized impersonalist or the Paramātmā-realized yogī to understand Kṛṣṇa, the Supreme Personality of Godhead as the son of mother Yaśodā or the charioteer of Arjuna. Even the great demigods are sometimes confused about Kṛṣṇa (muhyanti yat sūrayaḥ). Māṁ tu veda na kaścana: "No one knows Me as I am," the Lord says. And if one does know Him, then sa mahātmā su-durlabhaḥ. "Such a great soul is very rare." Therefore unless one practices devotional service to the Lord, one cannot know Kṛṣṇa as He is (tattvataḥ), even though one is a great scholar or philosopher.
(Srimad Bhagavatam-----7:3-----purport).

The first one, Mahā-viṣṇu, creates the total material energy, known as the mahat-tattva. The second, Garbhodakaśāyī Viṣṇu, enters into all the universes to create diversities in each of them. The third, Kṣīrodakaśāyī Viṣṇu, is diffused as the all-pervading Supersoul in all the universes and is known as Paramātmā. He is present even within the atoms. Anyone who knows these three Viṣṇus can be liberated from material entanglement."
(Srimad Bhagavatam-----7:4-----purport).

Even the brahma-jyotir, which is the ultimate goal of the impersonalists, is a spiritual energy manifested in the spiritual sky. There are no spiritual diversities in the brahma-jyotir as there are in the Vaikuṇṭhalokas, and the impersonalist accepts this brahma-jyotir as the ultimate eternal goal. The Paramātmā manifestation is also a temporary all-pervasive aspect of the Kṣīrodakaśāyī Viṣṇu. The Paramātmā manifestation is not eternal in the spiritual world. Therefore the factual Absolute Truth is the Supreme Personality of Godhead Kṛṣṇa. He is the complete energetic person, and He possesses different separated and internal energies.
(Srimad Bhagavatam-----7:4-----purport).