Just like you infect some disease, nature's law is that you must suffer from that disease. Nobody has got to do anything. The law is so... Nature's law is like that. If you take more food than you can digest... (aside:) (child crying) Where is that child? Then immediately there will be dysentery. This is nature's law. If you take more than you can digest, then immediately there will be indigestion, means you cannot assimilate so much food. That is nature's law. If you touch fire, either you touch or your innocent child touch, the fire will burn it. Fire will not consider that "Here is a child. Let me excuse." No, it will burn. This is nature's law. Similarly, the thoughts which you are maintaining during your lifetime, if that thought becomes prominent—naturally it becomes—at the time of death, then you are going to get a similar body. If you are thinking like a demon, then you get the demon's body next life. And if you are thinking like a devotee, then you get your next life back to home, back to Godhead. This is nature's law.
Therefore, if you practice instead of thinking like the demons, how to gratify senses... That is the demonic thought. They are concerned with this body. If you think of Kṛṣṇa, how to serve Him, that is your perfection of life. Because you'll think at the time of death of Kṛṣṇa. Ante nārāyaṇa-smṛtiḥ (SB 2.1.6). That is the perfection of life. Ante, at the time of death, if you remember Kṛṣṇa, then your life is successful. Tyaktvā dehaṁ punar janma naiti mām eti kaunteya (BG 4.9). So we have to do like that, not like the asuras or demons. Thinking must be there, but if you think of this body—how to keep it very comfortably, how to enjoy senses, how to have more money, how to have more men or women, how to see naked dance, how to do, how to this, how to this—then you are demon. And at the time of death, naturally we shall think of. Then I get again demonic life or animal life or tree life.