So what is the ultimate knowledge? Ultimate knowledge is described: bahūnāṁ janmanām ante jñānavān māṁ prapadyate (BG 7.19). That is ultimate knowledge. After speculating knowledge life after life, when one comes to the point to surrender unto Kṛṣṇa, that is real knowledge. That is real knowledge. Unless you come to the point of surrendering unto Kṛṣṇa, your knowledge is defective. You may advertise yourself as very learned scholar, but we have got simple formula. Our position is very strong and simple. We . . . we take the words of Kṛṣṇa and corroborate with Kṛṣṇa's words.
Now, when I see . . . when we see that one man is not a devotee of Kṛṣṇa, or he does not surrender to Kṛṣṇa, immediately we take him belonging to the four classes: duṣkṛtinaḥ, mūḍhāḥ, narādhamāḥ, māyayā apahṛta-jñānāḥ. Immediately we take. It doesn't require much time to test him, what he is, because he has no surrender to Kṛṣṇa and talks all nonsense. There are so many Gītā explainer in our country—simply talking nonsense, minus Kṛṣṇa. That's all. Bhagavad-gītā means minus Kṛṣṇa. That's all.
Such rascals have spoiled the whole country, you see. Everyone is so . . . politicians, and this, that, all, they are . . . "Oh, we are student of Bhagavad-gītā." And what do you know about Kṛṣṇa? "Kṛṣṇa is zero." That's all. This is going on. So therefore Kṛṣṇa says, na māṁ duṣkṛtino mūḍhāḥ prapadyante narādhamāḥ (BG 7.15). So we have to hear. If we actually want to diminish our anarthas, then we must hear Kṛṣṇa as He's speaking, without any interpretation.
So this is the process of diminishing all dirty things within the heart. Śṛṇvatāṁ sva-kathāḥ kṛṣṇaḥ puṇya-śravaṇa-kīrtanaḥ, hṛdy antaḥ-sthaḥ (SB 1.2.17). Kṛṣṇa is hṛdy antaḥ-sthaḥ, within your heart. Vidhunoti. He washes all dirty things. Kṛṣṇa is taking charge of washing your dirty things. Simply by hearing about, you . . . why don't you take this opportunity? What is this nonsense? Kṛṣṇa simply says that, "You hear about, from . . . about Me." Satataṁ kīrtayanto mām (BG 9.14): "Always chanting about Me and hearing about Me." Simple process.
But the rascals will not take. They will make humbugs, jugglery of words: "This is meaning, this is meaning, this is meaning." Therefore they do not advance. Andhā yathāndhair upanīyamānāḥ (SB 7.5.31). The story of anchor. The anchor was not taken, and the whole night they rowed on the boat, and it was where it was there.