So every moment we are having a new body. And that is a medical science truth. Medical science, it is . . . we are having new body every moment. Similarly, when we take another body, oh, a person who knows things as they are, they are not bewildered. Dhīras tatra na muhyati. Dhīra means who is conscious of this bodily change, who knows things as they are, he's not, I mean to . . . bewildered. He's not, he's, he's steady, "Oh, he has changed his body. That's all."
A person who does not know, he's crying. He . . . "Oh, my son is gone. My son is gone. My son is gone." But if he's, I mean to say, in the consciousness, he knows, "Oh, my son has simply changed the body." That's all. Just immediately, exactly, "My son, when he was little baby . . . now he has grown up to be a boy." So the father and the parents do not lament, "Oh, where my that son gone, that small baby gone?" Similarly, that change of body . . .
So our body is like that. We are changing, in the material condition. In the material condition we are simply changing our body. That is our disease. This conditional life of changing the body, one after another, one after . . . not only human body. We may have to change to animal's body or to another demigod's body. There are different species of life. I have several times spoken before you that there are 8,400,000's of species of life. So our body's being changed in this circle of these 8,400,000's of different species of life. This is called our material bondage.
Now, here Kṛṣṇa says that one who knows the Kṛṣṇa's transcendental birth and activities in truth, he gets free from this entanglement. He at once gets free from this entanglement. Now, here the word tattvataḥ is very important. The tattvataḥ is the science of Kṛṣṇa. Tattvataḥ, "in truth." Simply by knowing by historical fact that Kṛṣṇa is born in such-and-such date, in such-and-such place, in such-and-such family, He did such-and-such activity . . . but no. One has to learn that in tattvataḥ, in truth. Then he becomes free from this bodily entanglement. How it is closed?
Now, how that tattvataḥ, in truth, the Kṛṣṇa science, how one can understand? Kṛṣṇa science, that is explained in the Eighteenth Chapter, how Kṛṣṇa science can be understood. Kṛṣṇa science can be understood by this devotional service. You'll find this verse, that bhaktyā mām abhijānāti yāvān yaś cāsmi tattvataḥ (BG 18.55). Yāvān yaś cāsmi tattvataḥ. The truth of Kṛṣṇa science can be understood by become . . . by becoming a devotee, or a person of Kṛṣṇa consciousness. One who is Kṛṣṇa conscious, the process of Kṛṣṇa consciousness, he can simply understand what is this science of Kṛṣṇa; others cannot.