Four things are already supplied you require to keep your body fit. That is supplied by God, by Kṛṣṇa. He has given everyone. Then why you are bothering? You are human being, you have got so much nice brain, civilized. Why you are so much busy for these four things? If God has supplied these four things to the animals, beasts, birds, is He very miserly that He'll not supply to the human being? No. There is food. You have got your particular type of teeth for eating fruits, flowers, grains. You haven't got canine teeth. Why you should eat meat? This is not your food.
So in this way we have to acquire knowledge. Not like blind men. But unfortunately, we prefer to become a servant of a blind leader instead of Kṛṣṇa. This is our disease. We shall serve. I asked this question to Professor Kotovsky that, "Your Communist philosophy and our Kṛṣṇa consciousness, where is the difference? You have selected your leader and you have sold yourself to the orders of Lenin. And we have also bowed down to Kṛṣṇa and we have sold ourselves to Kṛṣṇa. So on principle, where is the difference?" There is no difference. You have to select one leader. We have also selected one . . . now, if the leader is perfect, then my life is perfect. If the leader is wrong, then your life is wrong. So he could not answer it.
The principle is there. You have to select one leader and you have to act by his order. That is, that is our nature. Because Caitanya Mahāprabhu says, jīvera svarūpa haya nitya-kṛṣṇa-dāsa (CC Madhya 20.108-109). Every living entity is eternal servant of Kṛṣṇa. When he forgets Kṛṣṇa he becomes servant of māyā. That is our position. We have to serve. Therefore self-realization means to understand oneself that, "I am dependent on Kṛṣṇa. I am eternal servant of Kṛṣṇa. Let me engage myself to the service of the Lord." That is perfection of knowledge.