Śrīmad-Bhāgavatam 3.25.43
—
Bombay, December 11, 1974
Therefore Kṛṣṇa says, bahūnāṁ janmanām ante jnānavān māṁ prapadyate [Bg. 7.19]. Who surrenders to Kṛṣṇa? Unless one is fully in knowledge, "What is Absolute Truth, what I am, what is my relationship with the Absolute Truth..." That is called knowledge. And if one understands that "Kṛṣṇa is my eternal master. He is my eternal father. I am not this body. I am also the same thing as Kṛṣṇa, spiritual..." Mamaivāṁśaḥ. "I am part and parcel of Kṛṣṇa. If Kṛṣṇa is gold, then I am also gold. But Kṛṣṇa is gold mine; I am gold earring, that's all." This is knowledge. Jnāna-vairāgya-yuktena. And when one comes to this knowledge, then he becomes reluctant to this material attachment. That is called vairāgya. Just like you boys and girls who have joined this movement. You have understood to some extent that "We didn't require this material opulence. We want Kṛṣṇa."
So the idea that we don't want this material opulence, that is called vairāgya. And why you want Kṛṣṇa? Because Kṛṣṇa is your eternal master, eternal father. That is called jnāna. Jnāna-vairāgya-yuktena. Not sentimental. We must know very clearly what is Kṛṣṇa—that is jnāna—what is my relationship with Kṛṣṇa—that is jnāna—and what is my duty to Kṛṣṇa—that is jnāna. And as soon as you know all these things—what is Kṛṣṇa, what you are, what is your relationship, and what is your duty—then naturally you become reluctant to these material activities. That is called vairāgya.