As long as the child is within the womb of his mother, he is in a very precarious and horrible condition of life, but the benefit is that he revives pure consciousness of his relationship with the Supreme Lord and prays for deliverance. But once he is outside the abdomen, when a child is born, māyā, or the illusory energy, is so strong that he is immediately overpowered into considering his body to be his self. Māyā means "illusion," or that which is actually not. In the material world, everyone is identifying with his body. This false egoistic consciousness of "I am this body" at once develops after the child comes out of the womb. The mother and other relatives are awaiting the child, and as soon as he is born, the mother feeds him, and everyone takes care of him. The living entity soon forgets his position and becomes entangled in bodily relationships. The entire material existence is entanglement in this bodily conception of life. Real knowledge means to develop the consciousness of "I am not this body. I am spirit soul, an eternal part and parcel of the Supreme Lord." Real knowledge entails renunciation, or nonacceptance of this body as the self.
(Srimad Bhagavatam----3:31:20----purport).

By the influence of māyā, the external energy, one forgets everything just after birth. Therefore the child is praying that he prefers to remain within the womb rather than come out. It is said that Śukadeva Gosvāmī, on this consideration, remained for sixteen years within the womb of his mother; he did not want to be entangled in false bodilyidentification. After cultivating such knowledge within the womb of his mother, he came out at the end of sixteen years and immediately left home so that he might not be captured by the influence of māyā. The influence of māyā is also explained in Bhagavad-gītā as insurmountable. But insurmountable māyā can be overcome simply by Kṛṣṇa consciousness. That is also confirmed in Bhagavad-gītā (7.14): mām eva ye prapadyante māyām etāṁ taranti te. Whoever surrenders unto the lotus feet of Kṛṣṇa can get out of this false conception of life. By the influence of māyā only, one forgets his eternal relationship with Kṛṣṇa and identifies himself with his body and the by-products of the body—namely wife, children, society, friendship and love. Thus he becomes a victim of the influence of māyā, and his materialistic life of continued birth and death becomes still more stringent.
(Srimad Bhagavatam----3:31:20----purport).

The expansion of ignorance is explained in this verse. The first ignorance is to identify one's material body, which is made of five elements, as the self, and the second is to accept something as one's own due to a bodily connection. In this way, ignorance expands. The living entity is eternal, but because of his accepting nonpermanent things, misidentifying his interest, he is put into ignorance, and therefore he suffers material pangs.
(Srimad Bhagavatam----3:31:30----purport).

Persons who identify with bodily existence are attached to the fruitive activities described in the Vedic literature. For example, in the Vedas it is said that one who observes the cāturmāsya vow will attain eternal happiness in the heavenly kingdom. In Bhagavad-gītā, it is said that this flowery language of the Vedas mostly attracts persons who identify with the body. To them such happiness as that of the heavenly kingdom is everything; they do not know that beyond that is the spiritual kingdom, or kingdom of God, and they have no knowledge that one can go there. Thus they are bereft of transcendental knowledge. Such persons are very careful in observing the rules and regulations of household life in order to be promoted in the next life to the moon or other heavenly planets. It is stated here that such persons are attached to grāmya-sukha, which means "material happiness," without knowledge of eternal, blissful spiritual life.
(Srimad Bhagavatam----4:2:22----purport).

The living entity is constitutionally pure. Asaṅgo hy ayaṁ puruṣaḥ. In the Vedic literature it is said that the soul is always pure and uncontaminated by material attachment. The identification of the body with the soul is due to misunderstanding. As soon as one is fully Kṛṣṇa conscious it is to be understood that one is in his pure, original constitutional position. This state of existence is called śuddha-sattva, which means that it is transcendental to the material qualities. Since this śuddha-sattva existence is under the direct action of the internal potency, in this state the activities of material consciousness stop.
(Srimad Bhagavatam----4:3:23----purport).

The living entity, or the soul, is ever existing and eternal. It cannot be lost, but learned scholars say that it is lost when actual knowledge is not working. That is the difference between animals and human beings. According to less intelligent philosophers, animals have no soul. But factually animals have souls. Due to the animals' gross ignorance, however, it appears that they have lost their souls. Without the soul, a body cannot move. That is the difference between a living body and a dead body. When the soul is out of the body, the body is called dead. The soul is said to be lost when there is no proper knowledge exhibited. Our original consciousness is Kṛṣṇa consciousness because we are part and parcel of Kṛṣṇa. When this consciousness is misguided and one is put into the material atmosphere, which pollutes the original consciousness, one thinks that he is a product of the material elements. Thus one loses his real remembrance of his position as part and parcel of the Supreme Personality of Godhead, just as a man who sleeps forgets himself. In this way, when the activities of proper consciousness are checked, all the activities of the lost soul are performed on a false basis. At the present moment, human civilization is acting on a false platform of bodily identification; therefore it can be said that the people of the present age have lost their souls, and in this respect they are no better than animals.
(Srimad Bhagavatam----4:22:31----purport).

The self-realized soul never thinks that he and the Supreme Personality of Godhead are one in every respect. Although he and the Supreme Personality of Godhead are one in quality, the living entity is prone to forget his spiritual identity, whereas the Supreme Personality never forgets. This is the difference between lipta and alipta. The Supreme Personality of Godhead is eternally alipta, uncontaminated by the external energy. The conditioned soul, however, being in contact with material nature, forgets his real identity; therefore when he sees himself in the conditioned state, he identifies himself with the body. For the Supreme Personality of Godhead, however, there is no difference between the body and the soul. He is completely soul; He has no material body. Although the Supersoul, Paramātmā, and the individual soul are both within the body, the Supersoul is devoid of designation, whereas the conditioned soul is designated by his particular type of body.
(Srimad Bhagavatam----4:28:63----purport).

The desires in the subtle body of mind, intelligence and ego cannot be fulfilled without a gross body composed of the material elements earth, water, air, fire and ether. When the gross material body is not manifest, the living entity cannot factually act in the modes of material nature. In this verse it is clearly explained that the subtle activities of the mind and intelligence continue due to the sufferings and enjoyments of the living entity's subtle body. The consciousness of material identification (such as "I" and "mine") still continues because such consciousness has been extant from time immemorial. However, when one transfers to the spiritual world by virtue of understanding Kṛṣṇa consciousness, the actions and reactions of both gross and subtle bodies no longer bother the spirit soul.
(Srimad Bhagavatam----4:29:70----purport).

Foolish people deny the existence of the soul, but it is a fact that when we sleep we forget the identity of the material body and when we awake we forget the identity of the subtle body. In other words, while sleeping we forget the activities of the gross body, and when active in the gross body we forget the activities of sleeping. Actually both states—sleeping and waking—are creations of the illusory energy. The living entity actually has no connection with either the activities of sleep or the activities of the so-called wakened state. When a person is in deep sleep or when he has fainted, he forgets his gross body. Similarly, under chloroform or some other anesthetic, the living entity forgets his gross body and does not feel pain or pleasure during a surgical operation. Similarly, when a man is suddenly shocked by some great loss, he forgets his identification with the gross body. At the time of death, when the temperature of the body rises to 107 degrees, the living entity falls into a coma and is unable to identify his gross body. In such cases, the life air that moves within the body is choked up, and the living entity forgets his identification with the gross body. Because of our ignorance of the spiritual body, of which we have no experience, we do not know of the activities of the spiritual body, and in ignorance we jump from one false platform to another. We act sometimes in relation to the gross body and sometimes in relation to the subtle body. If, by Kṛṣṇa's grace, we act in our spiritual body, we can transcend both the gross and subtle bodies. In other words, we can gradually train ourselves to act in terms of the spiritual body.
(Srimad Bhagavatam----4:29:71----purport).