People sometimes say: "Is it Vedic instruction that I have to accept it without argument?" Actually, that is Vedic instruction. Just like, for example, the Vedas says cow dung is pure. Now actually we are accepting, those who are following the Vedic principles, they accept cow dung as pure. Actually, it is pure.
But if we argue, "How is that, that animal stool is impure, even human stool is impure. How cow dung, which is stool of another animal, is pure? It is contrary." But actually, we accept. Actually we accept. Similarly, conchshell, conchshell is nothing but bone of an animal. According to our Vedic version, if you touch the bone of an animal, you become immediately impure; you have to take bath. But this bone of animal, conchshell, is taken to the Deity room, it is so pure.
So from our human consciousness we find contradiction in the Vedic instruction, that in the Vedas, in one place it says that the bone of an animal is impure, in another place says the bone of a particular animal is pure. The Vedas says the stool of an animal is impure, but in another place it says that the stool of the cow animal is pure.
So apparently we find contradiction. But still, because we accept the authority of the Vedas, therefore we accept the statement also. We accept the bone of the conchshell, and we accept the stool of cow as pure. That is acceptance of authority. You cannot argue. Even though it appears it is contradictory, you cannot argue.