Henry Ford

One good way to hinder progress is to fill a man's head with all the learning of the past; it makes him feel that because his head is full, there is nothing more to learn. Merely gathering knowledge may become the most useless work a man can do. What can you do to help and heal the world? That is the educational test. If a man can hold up his own end, he counts for one. If he can help ten or a hundred or a thousand other men hold up their ends, he counts for more. He may be quite rusty on many things that inhabit the realm of print, but he is a learned man just the same. When a man is master of his own sphere, whatever it may be, he has won his degree--he has entered the realm of wisdom.