When we are materially contaminated, we are called conditioned. False consciousness is exhibited under the impression that I am a product of material nature. This is called false ego. One who is absorbed in the thought of bodily conceptions cannot understand his situation. Bhagavad-gītā was spoken to liberate one from the bodily conception of life, and Arjuna put himself in this position in order to receive this information from the Lord. One must become free from the bodily conception of life; that is the preliminary activity for the transcendentalist. One who wants to become free, who wants to become liberated, must first of all learn that he is not this material body. Mukti, or liberation, means freedom from material consciousness. In the Śrīmad-Bhāgavatam also the definition of liberation is given. Muktir hitvānyathā-rūpaṁ svarūpeṇa vyavasthitiḥ: (S.B.-2:10:6) mukti means liberation from the contaminated consciousness of this material world and situation in pure consciousness. All the instructions of Bhagavad-gītā are intended to awaken this pure consciousness, and therefore we find at the last stage of the Gītā's instructions that Kṛṣṇa is asking Arjuna whether he is now in purified consciousness. Purified consciousness means acting in accordance with the instructions of the Lord. This is the whole sum and substance of purified consciousness. Consciousness is already there because we are part and parcel of the Lord, but for us there is the affinity of being affected by the inferior modes. But the Lord, being the Supreme, is never affected. That is the difference between the Supreme Lord and the small individual souls.
(Bhagavad-Gita Introduction).

When one can see that the various bodies of living entities arise due to the different desires of the individual soul and do not actually belong to the soul itself, one actually sees. In the material conception of life, we find someone a demigod, someone a human being, a dog, a cat, etc. This is material vision, not actual vision. This material differentiation is due to a material conception of life. After the destruction of the material body, the spirit soul is one. The spirit soul, due to contact with material nature, gets different types of bodies. When one can see this, he attains spiritual vision; thus being freed from differentiations like man, animal, big, low, etc., one becomes purified in his consciousness and able to develop Kṛṣṇa consciousness in his spiritual identity.
(Bhagavad-Gita---13:31---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).

Persons who work at their prescribed duties, not for sense gratification but for gratification of the Supreme Lord, are called niḥsaṅga, freed from the influence of the modes of material nature. Nyasta-karmāṇaḥ indicates that the results of their activities are given to the Supreme Personality of Godhead. Such persons appear to be acting on the platform of their respective duties, but such activities are not performed for personal sense gratification; rather, they are performed for the Supreme Person. Such devotees are called praśāntāḥ, which means "completely satisfied." Śuddha-cetasaḥ means Kṛṣṇa conscious; their consciousness has become purified. In unpurified consciousness one thinks of himself as the Lord of the universe, but in purified consciousness one thinks himself the eternal servant of the Supreme Personality of Godhead. Putting oneself in that position of eternal servitorship to the Supreme Lord and working for Him perpetually, one actually becomes completely satisfied. As long as one works for his personal sense gratification, he will always be full of anxiety. That is the difference between ordinary consciousness and Kṛṣṇa consciousness.
(Srimad Bhagavatam---3:32:5---purport).