Genius is seldom recognized for what it is: a great capacity for hard work.

The only real mistake is the one from which we learn nothing.

History doesn't mean dates and wars and textbooks to me; it means the unconquerable pioneer spirit of man.

You take all the experience and judgment of men over 50 out of the world and there wouldn't be enough left to run it.

There is safety in small beginnings and there is unlimited capital in the experience gained by growing.

The hardest thing in the world to do is to think, and that is why people do so little of it.

People are as happy as they choose to be.