Candanacarya: One time you said that Krsna consciousness is not difficult, but to remain determined, that is difficult. Determination is difficult.
Prabhupada: That determination comes by tapasya. Therefore we have got rules and regulation. If you follow the rules and regulation, then you will be determined. Otherwise, you will be victim of maya. The rules and regulation is there just to keep you fixed up in your determination. But if you don't follow, then you fall down. Just like physician says, "You don't take this along with medicine. You take this." That is rules and regulation. If you follow, then you do not become victim of disease again. If you don't follow, then you... What the physician will do?
Candanacarya: But it also requires determination to follow the tapasya.
Prabhupada: Then if he cannot, then he is cat and dog. He is not a human being. Why he should accept initiation? Let him remain a cat and dog. He promises to follow, and if he cannot follow, then he is nothing but cat and dog. In the court, they take promises, that "In the name of God," "In the name of Bible." So that means he will speak the truth. Similarly, before the fire, before Deity, before guru, before devotees, he is promising something, and if he does not follow, then he is cat and dog. He cannot advance. It is not possible. That is the distinction between cat and dog and human being. Cat and dog, they cannot promise. It is not possible. But a human being can promise. And if he keeps his promise, then he is human being. Otherwise cat and dog. Word of honor. The cats and dogs, they have no sense of honor. Either you kick him or pat, he does not know what is the difference. That is cat and dog. He does not know the distinction. A human being knows what is promise, what is word of honor.
(Morning Walk -- January 10, 1974, Los Angeles)