Lord Caitanya explained to Sanātana Gosvāmī the real constitutional position of the individual. He said directly that each and every individual soul is eternally a servitor of Kṛṣṇa. Jīvera 'svarūpa' haya-kṛṣṇera 'nitya-dāsa': (CC.2:20:108) every individual soul is eternally a servitor. When one is fixed in the understanding that he is part and parcel of the Supreme Soul and that his eternal position is to serve in association with the Supreme Lord, he becomes self-realized. This position of rightly understanding oneself cuts the knot of material attraction (hṛdaya-granthi-bhedanam). Due to false ego, or false identification of oneself with the body and the material world, one is entrapped by māyā, but as soon as one understands that he is qualitatively the same substance as the Supreme Lord because he belongs to the same category of spirit soul, and that his perpetual position is to serve, one attains ātma-darśanam and hṛdaya-granthi-bhedanam, self-realization.
(Srimad Bhagavatam----3:26:2----purport).

The four internal senses, or subtle senses, described herein are defined by different characteristics. When pure consciousness is polluted by material contamination and when identification with the body becomes prominent, one is said to be situated under false ego. Consciousness is the function of the soul, and therefore behind consciousness there is soul. Consciousness polluted by material contamination is called ahaṅkāra.
(Srimad Bhagavatam----3:26:14----purport).

The living entity's fear of death is due to his false ego of identifying with the body. Everyone is afraid of death. Actually there is no death for the spirit soul, but due to our absorption in the identification of body as self, the fear of death develops. It is also stated in the Śrīmad-Bhāgavatam (11.2.37), bhayaṁ dvitīyābhiniveśataḥ syāt. Dvitīya refers to matter, which is beyond spirit. Matter is the secondary manifestation of spirit, for matter is produced from spirit. Just as the material elements described are caused by the Supreme Lord, or the Supreme Spirit, the body is also a product of the spirit soul. Therefore, the material body is called dvitīya, or "the second." One who is absorbed in this second element or second exhibition of the spirit is afraid of death. When one is fully convinced that he is not his body, there is no question of fearing death, since the spirit soul does not die.
(Srimad Bhagavatam----3:26:16----purport).

In the beginning, from clear consciousness, or the pure state of Kṛṣṇa consciousness, the first contamination sprang up. This is called false ego, or identificationof the body as self. The living entity exists in the natural state of Kṛṣṇa consciousness, but he has marginal independence, and this allows him to forget Kṛṣṇa. Originally, pure Kṛṣṇa consciousness exists, but because of misuse of marginal independence there is a chance of forgetting Kṛṣṇa. This is exhibited in actual life; there are many instances in which someone acting in Kṛṣṇa consciousness suddenly changes. In the Upaniṣads it is stated, therefore, that the path of spiritual realization is just like the sharp edge of a razor. The example is very appropriate. One shaves his cheeks with a sharp razor very nicely, but as soon as his attention is diverted from the activity, he immediately cuts his cheek because he mishandles the razor.
(Srimad Bhagavatam----3:26:23-24----purport).

As described in the Patañjali yoga system, pramāṇa-viparyaya-vikalpa-nidra-smṛtyaḥ. By intelligence only one can understand things as they are. By intelligence only can one understand whether or not he is the body. The study to determine whether one's identity is spiritual or material begins in doubt. When one is able to analyze his actual position, the false identification with the body is detected. This is viparyāsa. When false identification is detected, then real identification can be understood. Real understanding is described here as niścayaḥ, or proved experimental knowledge. This experimental knowledge can be achieved when one has understood the false knowledge. By experimental or proved knowledge, one can understand that he is not the body but spirit soul.
(Srimad Bhagavatam----3:26:30----purport).

The appearance of consciousness after the appearance of false ego indicates that, from the beginning, material consciousness is under the mode of ignorance and that one therefore has to purify himself by purifying his consciousness. This purificatory process is called Kṛṣṇa consciousness. As soon as the consciousness is purified, the false ego disappears. Identification of the body with the self is called false identification, or false ego. Lord Caitanya confirms this in His Śikṣāṣṭaka. He states that the first result of chanting the mahā-mantra, Hare Kṛṣṇa, is that dirt is cleared from the consciousness, or the mirror of the mind, and then at once the blazing fire of material existence is over. The blazing fire of material existence is due to false ego, but as soon as the false ego is removed, one can understand his real identity. At that point he is actually liberated from the clutches of māyā. As soon as one is freed from the clutches of false ego, his intelligence also becomes purified, and then his mind is always engaged upon the lotus feet of the Supreme Personality of Godhead.
(Srimad Bhagavatam----3:26:61----purport).

A devotee should always remain ātmavān, or situated in his spiritual position. He should not forget that his main concern is to make advancement in spiritual consciousness, or Kṛṣṇa consciousness, and he should not ignorantly identify himself with the body or the mind. Ātmā means the body or the mind, but here the word ātmavān especially means that one should be self-possessed. He should always remain in the pure consciousness that he is spirit soul and not the material body or the mind. That will make him progress confidently in Kṛṣṇa consciousness.
(Srimad Bhagavatam----3:27:8----purport).

The conditioned souls are eager to identify with the body and consider that the body is "myself" and that anything in relationship with the body or possessions of the body is "mine." In Sanskrit this is called aham-mamatā, and it is the root cause of all conditional life. A person should see things as the combination of matter and spirit. He should distinguish between the nature of matter and the nature of spirit, and his real identification should be with spirit, not with matter. By this knowledge, one should avoid the false, bodily concept of life.
(Srimad Bhagavatam----3:27:9----purport).

In the Brahma-saṁhitā (5.38) it is stated that when one's eyes are smeared with love of Kṛṣṇa (premāñjana-cchurita), he always sees Kṛṣṇa, outside and inside. This is confirmed here; one should be freed from all other vision, and in that way he is freed from the false egoistic identification and sees himself as the eternal servitor of the Lord. Cakṣuṣevārkam: as we can see the sun without a doubt, one who is fully developed in Kṛṣṇa consciousness sees Kṛṣṇa and His energy. By this vision one becomes ātma-dṛk, or self-realized. When the false ego of identifying the body with the self is removed, actual vision of life is perceivable. The senses, therefore, also become purified. Real service of the Lord begins when the senses are purified. One does not have to stop the activities of the senses, but the false ego of identifying with the body has to be removed. Then the senses automatically become purified, and with purified senses one can actually discharge devotional service.
(Srimad Bhagavatam----3:27:10----purport).

The conditioned soul thinks, "I am this body," but a liberated soul thinks, "I am not this body. I am spirit soul." This "I am" is called ego, or identification of the self. "I am this body" or "Everything in relationship to the body is mine" is called false ego, but when one is self-realized and thinks that he is an eternal servitor of the Supreme Lord, thatidentification is real ego. One conception is in the darkness of the threefold qualities of material nature—goodness, passion and ignorance—and the other is in the pure state of goodness, called śuddha-sattva or vāsudeva. When we say that we give up our ego, this means that we give up our false ego, but real ego is always present. When one is reflected through the material contamination of the body and mind in false identification, he is in the conditional state, but when he is reflected in the pure stage he is called liberated. The identification of oneself with one's material possessions in the conditional stage must be purified, and one must identify himself in relationship with the Supreme Lord. In the conditioned state one accepts everything as an object of sense gratification, and in the liberated state one accepts everything for the service of the Supreme Lord. Kṛṣṇa consciousness, devotional service, is the actual liberated stage of a living entity. Otherwise, both accepting and rejecting on the material platform or in voidness or impersonalism are imperfect conditions for the pure soul.
(Srimad Bhagavatam----3:27:13----purport).

In a dream one may see himself expanded through many bodies, but when awake he can understand that those bodies were all false. Similarly, although a liberated soul has the by-products of the body-children, wife, house, etc.—he does not identify himself with those bodily expansions. He knows that they are all products of the material dream. The gross body is made of the gross elements of matter, and the subtle body is made of mind, intelligence, ego and contaminated consciousness. If one can accept the subtle body of a dream as false and not identify oneself with that body, then certainly an awake person need not identify with the gross body. As one who is awake has no connection with the activities of the body in a dream, an awakened, liberated soul has no connection with the activities of the present body. In other words, because he is acquainted with his constitutional position, he never accepts the bodily concept of life.
(Srimad Bhagavatam----3:28:38----purport).

After Brahman realization, one can engage in the activities of Brahman. As long as one is not self-realized, he engages in activities based on false identification with the body. When one is situated in his real self, then the activities of Brahman realization begin. The Māyāvādī philosophers say that after Brahman realization, all activities stop, but that is not actually so. If the soul is so active in its abnormal condition, existing under the covering of matter, how can one deny its activity when free? An example may be cited here. If a man in a diseased condition is very active, how can one imagine that when he is free from the disease he will be inactive? Naturally the conclusion is that when one is free from all disease his activities are pure. It may be said that the activities of Brahman realization are different from those of conditional life, but that does not stop activity. This is indicated in Bhagavad-gītā (18.54): after one realizes oneself to be Brahman, devotional service begins. Mad-bhaktiṁ labhate parām: (B.G.18:54) after Brahman realization, one can engage in the devotional service of the Lord. Therefore devotional service of the Lord is activity in Brahman realization.
(Srimad Bhagavatam----3:28:44----purport).