The living entity is the eternal servant of Kṛṣṇa. Being part and parcel of the Lord, he is constitutionally pure, but due to his contact with material energy, he identifies himself with either the gross or the subtle material body. Such identification is certainly false and constitutes the genuine platform of the theory of illusion. The living entity is eternal: he can never be subjected to the limits of time, as are his gross and subtle bodies. The cosmic manifestation is never false, but it is subject to change by the influence of the time factor. For a living entity to accept this cosmic manifestation as the field for his sense enjoyment is certainly illusory. This material world is the manifestation of the material energy of the Lord. This is explained by Kṛṣṇa in the Bhagavad-gītā (7.4):
bhūmir āpo ’nalo vāyuḥ khaṁ mano buddhir eva ca
ahaṅkāra itīyaṁ me bhinnā prakṛtir aṣṭadhā
"Earth, water, fire, air, ether, mind, intelligence and false ego—all together these eight constitute My separated material energies."
The material world is the inferior energy of the Supreme Personality of Godhead, but it is not a fact that the Supreme Lord has been transformed into this material world. The Māyāvādī philosophers, devoid of true understanding, have confused the theory of illusion and the theory of the cosmic manifestation by word jugglery. The theory of illusion can be applied to a person who identifies himself with the body. The living entity is the superior energy of the Supreme Lord, and the material world is the inferior energy. Both, however, are prakṛti (energy). Although the energies are simultaneously one with the Lord and different from Him, the Lord never loses His personal form due to the transformation of His different energies.
(Sri Caitanya Caritamrta-----2:6:173-----purport).

The Lord also said that the living entities are known as kṣetrajña, or "knowers of the field of activities." In the Thirteenth Chapter of Bhagavad-gītā, the body is described as the field of activities, and the living entity as kṣetrajña, the knower of that field. Although the living entity is constitutionally conversant with spiritual energy, or has the potency to understand spiritual energy, he is covered by the material energy and consequently identifies the body with the self. This false identification is called "false ego." Deluded by this false ego, the bewildered living entity in material existence changes his different bodies and suffers various kinds of miseries. Knowledge of the living entity's true position is possessed to different extents by different types of living entities.
(Teachings of Lord Caitanya).

Actually, māyā means "that which is not." It has no existence. Thus it is false to think that the living entity has no connection with the Supreme Lord. He may not believe in the existence of God, or he may think that he has no relationship with God, but these are all "illusions," or māyā. Due to absorption in this false conception of life, man is always fearful and full of anxieties. In other words, a godless concept of life is māyā. One who is actually learned in the Vedic literatures surrenders unto the Supreme Lord with great devotion and accepts Him as the supreme goal. When a living entity forgets the constitutional nature of his relationship with God, he is at once overwhelmed by the external energy. This is the cause of his false ego, his false identification of the body with the self. Indeed, his whole conception of the material universe arises from this false identification with the body, for he becomes attached to the body and its by-products. To escape this entanglement, he has only to perform his duty and to surrender unto the Supreme Lord with intelligence and devotion and with sincere Kṛṣṇa consciousness.
(Teachings of Lord Caitanya).

Kṛṣṇa's transcendental body is eternal, full of knowledge and bliss. Sat means ever-existing for all time and in all places; in other words, all-pervading in time and space. Cit means full of knowledge. Kṛṣṇa has nothing to learn from anyone. He is independently full of all knowledge. Ānanda means the reservoir of all pleasure. The impersonalists are seeking to merge into the Brahman effulgence of eternity and knowledge, but the major portion of the absolute pleasure which is in Kṛṣṇa is avoided by them. One can enjoy the transcendental blissfulness of merging into the Brahman effulgence after being freed from the contamination of material illusion, false identification, attachment, detachment and material absorption. These are the preliminary qualifications of a person who can realize Brahman. It is stated in Bhagavad-gītā that one has to become full of joyfulness; this is not exactly joyfulness, but a sense of freedom from all anxieties. Freedom from all anxieties may be the first principle of joyfulness, but it is not actual joyfulness. Those who realize the self, or become brahma-bhūta (S.B.4:30:20), are only preparing themselves for the platform of joyfulness. That joyfulness can be actually achieved only when one comes into contact with Kṛṣṇa.
(Nectar of Devotion).

Identifying the self with the material body and mind, or thinking that the soul is material, or thinking that everything in relation to the body belongs to oneself—such illusions keep a person ignorant and bereft of self-realization. Therefore Lord Kṛṣṇa advises us to be situated in knowledge of the self. When we become spiritually aware, we can understand that the "I," the self, is not the body or mind; we can realize that we are products of the superior, spiritual energy of the Supreme Lord and hence fully spiritual and eternal. With realization of these transcendental truths comes knowledge of the actual nature of the material energy in its pure form. And when these spiritual realizations gradually mature, one achieves a natural distance from the dualities of material nature. At this stage of spiritual development, the false ego is destroyed, all false identification and titles are removed, and we are liberated from the shackles of the illusory, material energy on the strength of our spiritual association with the Transcendence. No longer does māyā entangle us in material activities.
(Renunciation through Wisdom).

Progress in cultivating the human spirit entails the gradual disappearance of the materialistic ego. Covered by ignorance, passion, and so-called goodness, the spirit soul thinks himself all in all and is covered by a false sense of ego. Thus he falsely identifies the soul with the body, and his bodily relations with material things become the objects of his attraction. This false identification and attraction for matter gradually dry up and fade away by success in the cultivation of the human spirit. That is the effect of such higher cultivation. Progress in spiritual culture brings about the disintegration of false ego and material attraction.
(Light of the Bhagavata).

The process by which one can return home, back to Godhead, is bhakti-yoga, sometimes called sanātana-dharma. Instead of accepting a temporary occupational duty based on the material body, one should take to the process of sanātana-dharma, or bhakti-yoga, so that he can put an end to this perpetual bondage in material bodies and return home, back to Godhead. As long as human society works on the basis of false material identification, all the so-called advancements of science and philosophy are simply useless. They only serve to mislead human society. Andhā yathāndhair upanīyamānāḥ (S,B,7:5:31). In the material world, the blind simply lead the blind.
(Srimad Bhagavatam-----4:28:61-----purport).

When a person is disgusted with the temporary, illusory nature of this world and is thus detached from it, his mind, guided by the instructions of his spiritual master, considers again and again the nature of this world and eventually gives up the false identification with matter.
(Srimad Bhagavatam-----11:20:23-----translation).

A person fixed in transcendental knowledge is freed from conditioned life by giving up his false identification with the products of the material modes of nature. Seeing these products as simply illusion, he avoids entanglement with the modes of nature, although constantly among them. Because the modes of nature and their products are simply not real, he does not accept them.
(Srimad Bhagavatam-----11:26:2-----translation).

Although the false ego has no factual basis, it is perceived in many forms—as the functions of the mind, speech, life air and bodily faculties. But with the sword of transcendental knowledge, sharpened by worship of a bona fide spiritual master, a sober sage will cut off this false identification and live in this world free from all material attachment.
(Srimad Bhagavatam-----11:28:17-----translation).