There are two kinds of expansions of the Lord. One kind of expansion is called viṣṇu-tattva. Viṣṇu-tattva means the expansion, they are as equal as the God Himself. And there are expansions which are called the jīva-tattva, living entities. This expansion of the living entities, they are not equally powerful, but the expansion of viṣṇu-tattva is equally powerful, as good as God Himself. So the incarnation . . . incarnation of God means the expansion which is as good as God Himself. That is called incarnation.
So this, I mean to . . . Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare / Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare, is the expansion, incarnation, sound incarnation, of God. It is expansion and a plenary expansion, sound, sound representation . . . not representation; God, present Himself in this form of sound. Because we cannot see God with our present eyes, present eyes, because this is not our proper eyes.
They are material eyes. You don't think that this eye, the transparent thing which is floating in this, I mean to say, hole . . . that is not seeing. Similarly, if you can present, or if you take this eye . . . you cannot see. That cannot see. It is simply a lens only. It is only lens. So none of this body, bodily part, is actually the thing which is taking part.
So therefore with these eyes, with these material eyes, you cannot see. Ataḥ śrī-kṛṣṇa-nāmādi na bhaved grāhyam indriyaiḥ (CC Madhya 17.136). The present senses, the present senses cannot have any knowledge of the Supreme God. But how then we can have knowledge? If my senses are unfit, then how can I make it fit? Oh, that is the thing. That is the thing, that you have to spiritualize, spiritualize this material sense, I mean to say, organs. And then, when you spiritualize, then you can have the spiritual vision and see God and yourself.
The same example which I have recited many times: just like the iron rod. Iron rod, you put into the fire. It gets warm—warm, warmer, warmer. And when it is red hot, then it is no longer iron. Iron it is, but it does not act as iron, but it acts as fire. That iron rod which is red hot in association with fire, you can take that rod and touch anything, it will burn. That means it is no longer acting as iron; it is acting as fire.
Similarly, if you associate with this transcendental incarnation, sound incarnation of God, then you will be gradually godly. You will be godly. You can become godly with God's association, not by any other material, extraneous thing. No. Just like you can have fire only in association with fire, not with water. If you want to get yourself warm, then you have to associate with fire, not with water, not with air. Similarly, if you want to spiritualize your vision, if you want to spiritualize your action, if you want to spiritualize the whole constitution of your existence, then you have to associate with the supreme spirit.
And that supreme spirit is very kind, because He is everything. That we have already explained. Everything is interrelated with the Supreme; therefore He is interrelated with sound also. So by God's inconceivable potency, He can present before yourself in sound incarnation. That is His potency. That is His potency. He can do that. And therefore this name Kṛṣṇa and the Supreme Lord Kṛṣṇa, there is no difference.