At night the gross body does not work. We are thinking, "I am sleeping." Sleeping means the body is so much tired, it is no more working. But your another body, which is made of mind, intelligence and ego—subtle body—that is working. Everyone has got this experience. The subtle body takes you to another place or another condition. You are dreaming that you have gone to the jungle. You are meeting some animals. The tiger is there coming to attack you, and you are crying, "Here is tiger! Tiger! Tiger!" And the man who is not dreaming, he says, "Where is tiger? Why you are crying?" But he's actually . . . the result is there. Don't think that the result is not there. In dream you are thinking your lover is there, you are embracing, and you get discharge, not that that you are not working and it is not, there is no result. There is result. I cannot see what is the result, what you are dreaming. I am fool. I do not know. But the man who is dreaming, he is experiencing.
Similarly, change of body means we are carried by the subtle body to another gross body. This is the process, nature's way. You cannot say that "I will not change body." No, you will be forced. Just like a young man can say, "I will not become old man." No, nature will force you to become an old man, or change your body. This is the law of nature. You cannot surpass the laws of nature. Similarly, change of body, that is forced by the nature. Prakṛteḥ kriyamāṇāni guṇaiḥ karmāṇi sarvaśaḥ (BG 3.27). Prakṛteḥ, by the nature's law, we have to do. We are completely under nature's law, and we are declaring independence. This is our foolishness. This is our foolishness.