The theory that consciousness develops under certain circumstances of material combination is not accepted in the Bhagavad-gītā. Consciousness may be pervertedly reflected by the covering of material circumstances, just as light reflected through colored glass may appear to be a certain color, but the consciousness of the Lord is not materially affected. Lord Kṛṣṇa says, mayādhyakṣeṇa prakṛtiḥ (B.G.9:10). When He descends into the material universe, His consciousness is not materially affected. If He were so affected, He would be unfit to speak on transcendental matters as He does in the Bhagavad-gītā. One cannot say anything about the transcendental world without being free from materially contaminated consciousness. So the Lord is not materially contaminated. Our consciousness, at the present moment, however, is materially contaminated. The Bhagavad-gītā teaches that we have to purify this materially contaminated consciousness. In pure consciousness, our actions will be dovetailed to the will of īśvara, and that will make us happy. It is not that we have to cease all activities. Rather, our activities are to be purified, and purified activities are called bhakti. Activities in bhakti appear to be like ordinary activities, but they are not contaminated.
(Bhagavad-Gita-----introduction).

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).

There are three degrees of covering of the living entity by which his pure consciousness is obscured. This covering is but lust under different manifestations like smoke in the fire, dust on the mirror, and the womb about the embryo. When lust is compared to smoke, it is understood that the fire of the living spark can be a little perceived. In other words, when the living entity exhibits his Kṛṣṇa consciousness slightly, he may be likened to the fire covered by smoke. Although fire is necessary where there is smoke, there is no overt manifestation of fire in the early stage. This stage is like the beginning of Kṛṣṇa consciousness. The dust on the mirror refers to a cleansing process of the mirror of the mind by so many spiritual methods. The best process is to chant the holy names of the Lord. The embryo covered by the womb is an analogy illustrating a helpless position, for the child in the womb is so helpless that he cannot even move. This stage of living condition can be compared to that of the trees. The trees are also living entities, but they have been put in such a condition of life by such a great exhibition of lust that they are almost void of all consciousness. The covered mirror is compared to the birds and beasts, and the smoke-covered fire is compared to the human being. In the form of a human being, the living entity may revive a little Kṛṣṇa consciousness, and, if he makes further development, the fire of spiritual life can be kindled in the human form of life. By careful handling of the smoke in the fire, fire can be made to blaze. Therefore the human form of life is a chance for the living entity to escape the entanglement of material existence. In the human form of life, one can conquer the enemy, lust, by cultivation of Kṛṣṇa consciousness under able guidance.
(Bhagavad-Gita-----3:38-----purport).

Thus the wise living entity's pure consciousness becomes covered by his eternal enemy in the form of lust, which is never satisfied and which burns like fire.
(Bhagavad-Gita-----3:39-----translation).

Because one who works in Kṛṣṇa consciousness is servant to all, he is very dear to everyone. And because everyone is satisfied by his work, he is pure in consciousness. Because he is pure in consciousness, his mind is completely controlled. And because his mind is controlled, his senses are also controlled. Because his mind is always fixed on Kṛṣṇa, there is no chance of his being deviated from Kṛṣṇa. Nor is there a chance that he will engage his senses in matters other than the service of the Lord. He does not like to hear anything except topics relating to Kṛṣṇa; he does not like to eat anything which is not offered to Kṛṣṇa; and he does not wish to go anywhere if Kṛṣṇa is not involved. Therefore, his senses are controlled.
(Bhagavad-Gita-----5:7-----purport).

A person in Kṛṣṇa consciousness is pure in his existence, and consequently he has nothing to do with any work which depends upon five immediate and remote causes: the doer, the work, the situation, the endeavor and fortune. This is because he is engaged in the loving transcendental service of Kṛṣṇa. Although he appears to be acting with his body and senses, he is always conscious of his actual position, which is spiritual engagement. In material consciousness, the senses are engaged in sense gratification, but in Kṛṣṇa consciousness the senses are engaged in the satisfaction of Kṛṣṇa's senses. Therefore, the Kṛṣṇa conscious person is always free, even though he appears to be engaged in affairs of the senses. Activities such as seeing and hearing are actions of the senses meant for receiving knowledge, whereas moving, speaking, evacuating, etc., are actions of the senses meant for work. A Kṛṣṇa conscious person is never affected by the actions of the senses. He cannot perform any act except in the service of the Lord because he knows that he is the eternal servitor of the Lord.
(Bhagavad-Gita-----5:8-9-----purport).

This Bhagavad-gītā is the science of Kṛṣṇa consciousness. No one can become Kṛṣṇa conscious simply by mundane scholarship. One must be fortunate enough to associate with a person who is in pure consciousness. A Kṛṣṇa conscious person has realized knowledge, by the grace of Kṛṣṇa, because he is satisfied with pure devotional service. By realized knowledge, one becomes perfect. By transcendental knowledge one can remain steady in his convictions, but by mere academic knowledge one can be easily deluded and confused by apparent contradictions. It is the realized soul who is actually self-controlled, because he is surrendered to Kṛṣṇa. He is transcendental because he has nothing to do with mundane scholarship. For him mundane scholarship and mental speculation, which may be as good as gold to others, are of no greater value than pebbles or stones.
(Bhagavad-Gita-----6:8-----purport).

Here it is stated that there are some people who are pure in consciousness and who try to find out the Supersoul by meditation, and when they discover the Supersoul within themselves, they become transcendentally situated. Similarly, there are others who also try to understand the Supreme Soul by cultivation of knowledge, and there are others who cultivate the haṭha-yoga system and who try to satisfy the Supreme Personality of Godhead by childish activities.
(Bhagavad-Gita-----13:25-----purport).

In other words, if the living entity adulterates his consciousness with the qualities of cats and dogs, in his next life he gets a cat or dog body and enjoys. Consciousness is originally pure, like water. But if we mix water with a certain color, it changes. Similarly, consciousness is pure, for the spirit soul is pure. But consciousness is changed according to the association of the material qualities. Real consciousness is Kṛṣṇa consciousness. When, therefore, one is situated in Kṛṣṇa consciousness, he is in his pure life. But if his consciousness is adulterated by some type of material mentality, in the next life he gets a corresponding body. He does not necessarily get a human body again; he can get the body of a cat, dog, hog, demigod or one of many other forms, for there are 8,400,000 species.
(Bhagavad-Gita-----15:9-----purport).

The devotee is fully aware that he is one with the Absolute and at the same time in the eternal position of servant to the Absolute. In the material conception, one falsely thinks himself the lord of all he surveys, and therefore he is always troubled by the threefold miseries of life. But as soon as one comes to know his real position as transcendental servant, he at once becomes free from all miseries. As long as the living entity is trying to master material nature, there is no possibility of his becoming servant of the Supreme. Service to the Lord is rendered in pure consciousness of one's spiritual identity; by service one is immediately freed from material encumbrances.
(Srimad Bhagavatam-----1:1:2-----purport).

By attainment of absolute knowledge, one can be in association with the Lord constantly, even in this present life, simply by hearing, chanting, thinking of and worshiping the Supreme Lord. One can see Him, one can feel His presence even in this present life simply by understanding the advaya-jñāna Lord, or the Absolute Lord, through the process of devotional service, which begins with hearing about Him. Lord Caitanya says that simply by chanting the holy name of the Lord one can at once wash off the dust on the mirror ofpure consciousness, and as soon as the dust is removed, one is at once freed from all material conditions.
(Srimad Bhagavatam-----1:15:31-----purport).

The example cited herein of Śrī Brahmājī is one of forgetfulness. Brahmājī is the incarnation of one of the mundane attributes of the Lord. Being the incarnation of the passion mode of material nature, he is empowered by the Lord to generate the beautiful material manifestation. Yet due to his being one of the numerous living entities, he is apt to forget the art of his creative energy. This forgetfulness of the living being—beginning from Brahmā down to the lowest insignificant ant—is a tendency which can be counteracted by meditation on the virāṭ-rūpa of the Lord. This chance is available in the human form of life, and if a human being follows the instruction of Śrīmad-Bhāgavatam and begins to meditate upon the virāṭ-rūpa, then revival of his pure consciousness and counteraction of the tendency to forget his eternal relationship with the Lord can follow simultaneously.
(Srimad Bhagavatam-----2:2:1-----purport).

In the transcendental state the living being is pure in his consciousness, and as such he has no false ego to lord it over the material nature. Rather, his pure consciousness directs him to surrender unto the Supreme Lord, as stated in the Bhagavad-gītā (7.19): vāsudevaḥ sarvam iti sa mahātmā sudurlabhaḥ. All this indicates that in the transcendental state there is neither material creation nor the Causal Ocean for material nature. The above-mentioned state of affairs is factual on the transcendental plane, but is factually revealed in a transcendentalist's knowledge of the advanced state of pure consciousness. Such transcendentalists are of two types, namely the impersonalists and the devotees.
(Srimad Bhagavatam-----2:2:17-----purport).

Pure self-realization, as we have several times discussed, is the pure consciousness of admitting oneself to be the eternal servitor of the Lord. Thus one is reinstated in his original position of transcendental loving service to the Lord, as will be clearly explained in the following verse. This stage of rendering transcendental loving service to the Lord without any hopes of emolument from the Lord, or any other way, can be attained when the material senses are purified and the original pure state of the senses is revived.
(Srimad Bhagavatam-----2:2:30-----purport).

The external energy is controlled by the Lord, and the living entities are controlled by the external energy—by the will of the Lord. Therefore, although the living entity is purely conscious in his pure state, he is subordinate to the will of the Lord in being influenced by the external energy of the Lord. In the Bhagavad-gītā (15.15) also the same thing is confirmed; the Lord is present within the heart of every living entity, and all the living entity's consciousness and forgetfulness are influenced by the Lord.
Now the next question automatically made will be why the Lord influences the living entity to such consciousness and forgetfulness. The answer is that the Lord clearly wishes that every living entity be in his pure consciousness as a part and parcel of the Lord and thus be engaged in the loving service of the Lord as he is constitutionally made; but because the living entity is partially independent also, he may not be willing to serve the Lord, but may try to become as independent as the Lord is.
(Srimad Bhagavatam-----2:9:1-----purport).

The dream is that the conditioned soul thinks of his material body as "I" or falsely thinks that he is the Lord and that everything in connection with that material body is "mine." Thus only in dream does the misconception of "I" and "mine" persist life after life. This continues life after life, as long as the living entity is not purely conscious of his identity as the subordinate part and parcel of the Lord. In his pure consciousness, however, there is no such misconceived dream, and in that pure conscious state the living entity does not forget that he is never the Lord, but that he is eternally the servitor of the Lord in transcendental love.
(Srimad Bhagavatam-----2:9:1-----purport).

The two misconceptions of life, namely "I" and "mine," are verily manifested in two classes of men. In the lower state the conception of "mine" is very prominent, and in the higher state the misconception of "I" is prominent. In the animal state of life the misconception of "mine" is perceivable even in the category of cats and dogs, who fight with one another with the same misconception of "mine." In the lower stage of human life the same misconception is also prominent in the shape of "It is my body," "It is my house," "It is my family," "It is my caste," "It is my nation," "It is my country," and so on. And in the higher stage of speculative knowledge, the same misconception of "mine" is transformed into "I am," or "It is all I am," etc. There are many classes of men comprehending the same misconception of "I" and "mine', in different colors. But the real significance of "I" can be realized only when one is situated in the consciousness of "I am the eternal servitor of the Lord." This is pure consciousness, and the whole Vedic literatures teach us this conception of life.
(Srimad Bhagavatam-----2:9:3-----purport).

A poor man without any employment or occupation may undergo so many troubles in life, but if by chance the same man gets a good service under the government, he at once becomes happy. There is no profit in denying the supremacy of the Lord, who is the controller of all energies, but one should be constitutionally situated in one's own glory, namely to be situated in the pure consciousness of being the eternal servitor of the Lord.
(Srimad Bhagavatam-----2:9:3-----purport).

Persons who are sinful asuras like Kaṁsa and Jarāsandha cannot think of Lord Kṛṣṇa as the Supreme Personality of Godhead, the Absolute Truth. Only those who are pure devotees, those who follow the regulative principles of religious life as prescribed in the scriptures, are able to engage themselves in karma-yoga and then jñāna-yoga and thereafter, by pure meditation, can understand pure consciousness.
(Srimad Bhagavatam-----3:1:17-----purport).

Philosophically, one can understand that Lord Kṛṣṇa and His remembrance are on the absolute plane and that the very idea of searching for Him at Vṛndāvana in pure God consciousnessgives more pleasure to the devotee than seeing Him face to face. Such devotees of the Lord see Him face to face at every moment, as confirmed in the Brahma-saṁhitā (5.38):
premāñjana-cchurita-bhakti-vilocanena
santaḥ sadaiva hṛdayeṣu vilokayanti
yaṁ śyāmasundaram acintya-guṇa-svarūpaṁ
govindam ādi-puruṣaṁ tam ahaṁ bhajāmi
"Those who are in ecstasy of love with the Supreme Personality of Godhead, Lord Śyāmasundara (Kṛṣṇa), see Him always in their hearts due to love and devotional service rendered to the Lord."
(Srimad Bhagavatam-----3:1:24-----purport).

Mundane goodness can enlighten one that the body and the self are different, and one in goodness is concerned with the self and not the body. But due to being contaminated, those in mundane goodness cannot understand the real nature of the self as a person. Their impersonal conception of the self as distinct from the body keeps them in the mode of goodness within material nature, and unless they are attracted by kṛṣṇa-kathā, they will never be liberated from the bondage of material existence. Kṛṣṇa-kathā is the only remedy for all people of the world because it can situate one in pure consciousness of the self and liberate one from material bondage.
(Srimad Bhagavatam-----3:5:11-----purport).

The mahat-tattva is the total consciousness because a portion of it is represented in everyone as the intellect. The mahat-tattva is directly connected with the supreme consciousness of the Supreme Being, but still it appears as matter. The mahat-tattva, or shadow of pure consciousness, is the germinating place of all creation. It is pure goodness with the slight addition of the material mode of passion, and therefore activity is generated from this point.
(Srimad Bhagavatam-----3:5:27-----purport).

A pure living entity in his original spiritual existence is fully conscious of his constitutional position as an eternal servitor of the Lord. All souls who are situated in suchpure consciousness are liberated, and therefore they eternally live in bliss and knowledge in the various Vaikuṇṭha planets in the spiritual sky.
(Srimad Bhagavatam-----3:5:29-----purport).

The expansions of Vedic wisdom also give the nitya-baddhas, the conditioned living entities, a chance to improve, and those who take advantage of such transcendental knowledge gradually regain their lost consciousness of rendering transcendental loving service to the Lord. The demigods are amongst the conditioned souls who have developed this pure consciousness of service to the Lord but who at the same time continue to desire to lord it over the material energy.
(Srimad Bhagavatam-----3:5:51-----purport).

The conditioned soul is bewildered into various activities for want of pure consciousness. In pure consciousness the activity is one. The consciousness of the individual soul becomes one with the supreme consciousness when there is complete synthesis between the two.
(Srimad Bhagavatam-----3:6:7-----purport).