You will find that one who is very experienced medical practitioner, he gives you a prescription, and you visit him again and again, he gives you the same prescription, unless you are cured. His prescription is so nice that he doesn't change. But a nonexperienced physician, every time you go, he will change the prescription. But actually, those who are experienced, he knows, "This is the disease, and ultimately this medicine will cure. So let him repeat that medicine."
So our is that platform. Harer nāma harer nāma harer nāmaiva kevalam (CC Adi 17.21). We repeat only. We don't change: "Now hari-nāma is not curing, so let me add, instead of Hare Kṛṣṇa, 'John Kṛṣṇa,' if I may." No. No "John Kṛṣṇa." (laughter) That same Hare Kṛṣṇa must be repeated. And you will be cured. So change means imperfect knowledge. No change means that is perfect knowledge. So we follow that "no change" policy. No, not that because I think I have become now advanced, I change this to that. That means I am not advanced. My knowledge is imperfect; therefore I am changing.
So this verse, the appearance of Vaivasvata Manu is described. So Vaivasvata Manu is incarnation of God. Svāyambhuva Manu, Vaivasvata Manu. As I told you, there are fourteen manus within the day. Now out of that fourteen manus, this is the seventh manu. It is going on.
This Vaivasvata Manu is the seventh manu. So another seven manus, when they will be finished, this one day of Brahmā will be finished, and there will be another devastation. This is the law of nature.