We have to, I mean to say, repose our mind to the form of Kṛṣṇa. Kṛṣṇa says mayi, "Unto Me, Kṛṣṇa." We cannot see now Kṛṣṇa personally. Personally He is here, but we want to see anything physically. Physically He is also there. Here, Kṛṣṇa mūrti is physical, but because you are differently educated, you do not know what is this world of physics. We think that this is different from Kṛṣṇa. That will be explained. Therefore it is said, tac chṛṇu. Asaṁśayaṁ samagraṁ māṁ yathā jñāsyasi tac chṛṇu. "You just hear from Me, as you can understand Me in complete, without any doubt." So Kṛṣṇa is instructing Himself, about Himself. So why there should be any doubt? There cannot be any doubt. God is explaining Himself about Him, then why there should be doubt? This is the . . . this is called bhakti-yoga. Mad-āśrayaḥ. Mayy āsakta-manāḥ pārtha.
So how you can engage your mind in the Supreme Personality of Godhead if you do not know the form? Therefore Kṛṣṇa comes in His original form. Yadā yadā hi dharmasya glānir bhavati bhārata tadātmānaṁ sṛjāmy aham (BG 4.7). When people forget or become engaged otherwise, rascaldom, duṣkṛtinaḥ, at that time He comes. He comes Himself or sends His representative to make this rascal know that, "Here is Kṛṣṇa." Tadātmānaṁ sṛjāmy aham. In the form of name, in the form of Deity, in the form of picture, in the . . . so many ways. If you think of Kṛṣṇa within yourself, that "Kṛṣṇa is like this, Kṛṣṇa's leg is like this, Kṛṣṇa's flute is like this, Kṛṣṇa's hand is like this, mouth is like this, He is dressed like this," this meditation is perfect meditation—not imagination—so that your mind will be gradually absorbed in Kṛṣṇa.