A wise man is one who learns from all men. Learning only from our own experience is like learning the traffic rules by accident.
Wise men know not many things, but useful things. We don't need to know many things to succeed, if we know the few things that are important.
Smart men start where others leave off. From others they learn to correct and often avoid their own mistakes. It takes a smart man to recognize a wise man and a smarter one to learn from him.