The only person you should try to be better than is the person you were yesterday.
耳朵是负责听的，听了之后再加以审察，这叫做聪明。
The speech we hear is an indication of that which we don't hear. It is a necessary avoidance, a violent, sly, anguished or mocking smokescreen which keeps the other in its place.
"Books are the most powerful weapons in the world."