What you are will show in what you do.

From his neck down a man is worth a couple of dollars a day, from his neck up he is worth anything that his brain can produce.

We haven't failed. We now know a thousand things that won't work, so we are much closer to finding what will.

The only time I really become discouraged is when I think of all the things I would like to do and the little time I have in which to do them.

The stomach is the only part of man which can be fully satisfied. The yearning of man's brain for new knowledge and experience and for more pleasant and comfortable surroundings never can be completely met. It is an appetite which cannot be appeased.

To do much clear thinking a person must arrange for regular periods of solitude when they can concentrate and indulge the imagination without distraction.

I will not say I failed 1000 times, I will say that I discovered there are 1000 ways that can cause failure