Concentrate all your thoughts upon the work at hand. The sun's rays do not burn until brought to a focus.

You cannot force ideas. Successful ideas are the result of slow growth. Ideas do not reach perfection in a day, no matter how much study is put upon them.

Man is the result of slow growth; that is why he occupies the position he does in animal life. What does a pup amount to that has gained its growth in a few da…

I am a believer in unconscious cerebration. The brain is working all the time, though we do not know it. At night it follows up what we think in the daytime. W…

Useful undertakings which require sustained attention and vigorous precision in order to succeed often end up by being abandoned, for, in America, as elsewhere…

The worse the conditions of life the more productive the work, always provided you remember the work.

Nothing will work unless you do.