James A. Michener

Character consists of what you do on the third and fourth tries.

Calvin Coolidge

Nothing in the world can take the place of persistence.

Talent will not; nothing in the world is more common than unsuccessful men with talent.

Genius will not; unrewarded genius is a proverb.

Education will not; the world is full of educated derelicts.

Persistence and determination alone are omnipotent.

Albert Einstein

I think and think for months and years.

Ninety-nine times, the conclusion is false.

The hundredth time I am right.