et, and I never tell anyone abou it. That is, it is not easy for man to know himself, because his senses are all outward. For example, man can see others, but he cannot see himself. He can have the slightest sense of others, but he is much more insensitive to himself. One's own thoughts can be grasped,Lamella Plate Settler, but who can grasp the source of one's own thoughts. Someone can write wonderful novels and music, but he can't say the direct reason why he can write these things. Peo