If you spend too much time thinking about a thing, you'll never get it done.

I cannot teach anybody anything, I can only make them think.

To study and not think is a waste. To think and not study is dangerous.

If you think a thing is impossible, you'll make it impossible.

Character is higher than intellect...A great soul will be strong to live, as well as strong to think.

Success treads on every right step. For the instinct is sure, that prompts him to tell his brother what he thinks. He then learns, that in going down into the secrets of his own mind, he has descended into the secrets of all minds. He learns that he who has mastered any law in his private thoughts, is master to that extent of all men whose language he speaks, and of all into whose language his own can be translated.

I do not paint the things I see, I paint what I think.

Give up thinking as though not giving it up. Observe techniques as though not observing.