So ātma-tattva viśuddhy-artham. Ātma-tattva. Yāvan na jijñāsata ātma-tattvam. So the beginning of purification is first of all to understand, "What I am? Am I this body or something else?" Ātma-tattva. If we can understand myself, "What I am," then I can understand God also. Or if I can understand God, then I can understand me also. Just like if you see the sun, you can see yourself also. In the darkness you cannot see yourself, neither the sun.
So that is called ātma-tattva. Light. At night, darkness, dense darkness, you cannot see anything. I am walking in the dark, but I cannot see my hands and legs, where I am going. I am afraid: "Whether I shall fall into some ditch?" This is my position. Therefore it has to be purified. Ātma-tattva-viśuddhy-arthaṁ yad āha bhagavān ṛtam: "Bhagavān, the Supreme Personality, as He says . . . " So therefore we have to cleanse ourself, viśuddhy-artha. In order to cleanse, we have to hear from Bhagavān, the Supreme Personality of Godhead. He is coming. Out of His causeless mercy He is coming to reveal Himself, Kṛṣṇa: "It is like this. I am like this. You are like this." Both things.