When the mind is fully absorbed in Kṛṣṇa consciousness, it is said to be in samādhi, or trance. Anything done in such transcendental consciousness is called yajña, or sacrifice for the Absolute. In that condition of spiritual consciousness, the contributor, the contribution, the consumption, the performer or leader of the performance, and the result or ultimate gain—everything—becomes one in the Absolute, the Supreme Brahman. That is the method of Kṛṣṇa consciousness.
(Bhagavad-Gita---4:24---purport).

The constitutional position of the living entity is different from the position he takes in the material world. In material consciousness his nature is to try to be the lord of matter, but in spiritual consciousness, Kṛṣṇa consciousness, his position is to serve the Supreme. When the living entity is in material consciousness, he has to take on various bodies in the material world. That is called karma, or varied creation by the force of material consciousness.
((Bhagavad-Gita---8:3---purport).

As spirit is not annihilated even after the annihilation of the material body, so also spiritual consciousness is not annihilated. Śrī Nārada developed this spiritual consciousness even when he had his material body in the previous kalpa. Consciousness of the material body means spiritual consciousness expressed through the medium of a material body. This consciousness is inferior, destructible and perverted. But superconsciousness of the supramind in the spiritual plane is as good as the spirit soul and is never annihilated.
(Srimad Bhagavatam---1:6:4---purport).

Foolish men want to take credit for all creations made by them, but intelligent persons know very well that not a blade of grass can move without the will of the Lord; thus all the credit for wonderful creations must go to Him. By spiritual consciousness only can one be free from the contamination of material affection and receive the benedictions offered by the Lord.
(Srimad Bhagavatam---3:9:23---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.
(Srimad Bhagavatam---3:27:8---purport).

Māyā is very strong. In the name of philanthropy, altruism and communism, people are feeling compassion for suffering humanity throughout the world. Philanthropists and altruists do not realize that it is impossible to improve people's material conditions. Material conditions are already established by the superior administration according to one's karma. They cannot be changed. The only benefit we can render to suffering beings is to try to raise them to spiritual consciousness.
(Srimad Bhagavatam---5:8:10).

If one who is performing the Vedic ritualistic ceremonies becomes a devotee, even if he is a gṛhastha, he can receive the causeless mercy of Kṛṣṇa. The objective of a devotee is to return home, back to Godhead. Such a devotee, even though not performing ritualistic ceremonies, advances in spiritual consciousness by the supreme will of the Personality of Godhead. One may actually become successful in spiritual consciousness by the mercy of devotees, or one may fall from spiritual consciousness by being disrespectful to devotees.
(Srimad Bhagavatam---7:15--summary).