The consciousness of the individual soul is prone to be forgetful. When he is forgetful of his real nature, he obtains education and enlightenment from the superior lessons of Kṛṣṇa. But Kṛṣṇa is not like the forgetful soul. If so, Kṛṣṇa's teachings of Bhagavad-gītā would be useless.
(Bhagavad-Gita--2:20---purport).

Lord Śrī Caitanya Mahāprabhu preached this system of Bhāgavata-dharma, and He recommended that all those who were born in India should take the responsibility of broadcasting the messages of Lord Śrī Kṛṣṇa, primarily the message of Bhagavad-gītā. And when one is well established in the teachings of Bhagavad-gītā, he can take up the study of Śrīmad-Bhāgavatam for further enlightenment in self-realization.
(Srimad Bhagavatam---1:1:21---purport).

This enlightenment perfectly enables the devotee to distinguish spirit from matter because the knot of spirit and matter is untied by the Lord. This knot is called ahaṅkāra, and it falsely obliges a living being to become identified with matter. As soon as this knot is loosened, therefore, all the clouds of doubt are at once cleared off.
(Srimad Bhagavatam---1:1:21---purport).

To disseminate transcendental knowledge one must retire from mundane activities on the strength of enlightenment in knowledge in terms of Vedic wisdom.
(Srimad Bhagavatam--3:7:38---purport).

Bhagavad-gītā can be read or heard many times, but because it gives great pleasure, the more one reads Bhagavad-gītā the more he gets the appetite to read and understand it, and each time he gets new enlightenment. That is the nature of the transcendental message.
(Srimad Bhagavatam---3:25:2---purport).

The example is given that a person may apparently abstain from sleep all day, but as long as he is not spiritually enlightened he is actually sleeping. He may sleep at night and perform his duties in the daytime, but as long as he does not come to the platform of working in spiritual enlightenment he is considered to be always sleeping. A devotee, therefore, never forgets the benefit derived from the Lord.
(Srimad Bhagavatam---4:9:8---purport).

Factually, an advanced devotee avoids speaking with persons who are not in devotional life, but to those who are in devotional life he speaks in friendship, and he speaks to the innocent for their enlightenment.
(Srimad Bhagavatam---4:13:10---purport).

The Lord is like the sun, which illuminates everything and cannot be illuminated by anyone. Therefore, if one is serious about understanding the Supreme, one must receive enlightenment from Him, as instructed in Bhagavad-gītā. One cannot understand the Supreme Personality of Godhead by one's mental, physical or intellectual powers.
(Srimad Bhagavatam---8:3:10---purport0.

If one takes seriously the lotus feet of Kṛṣṇa, who is seated within one's heart, the Lord eradicates all ignorance. By the torch of knowledge, one immediately understands everything properly by the special mercy of the Supreme Lord and becomes self-realized. In other words, although a devotee may externally not be very well educated, because of his devotional service the Supreme Personality of Godhead gives him enlightenment from within. If the Lord gives enlightenment from within, how can one be in ignorance? Therefore the allegation of the Māyāvādīs that the devotional path is for the unintelligent or uneducated is untrue.
(Srimad Bhagavatam---8:3:16---purport).

Devotional service is enlightenment, or awakening. When the living entity perfectly performs spiritual activities under the direction of the spiritual master, he becomes perfect in knowledge and understands that he is not God but a servant of God.
(Sri Caitanya Caritamrta---1:7:118---purport).