Admitting a mistake takes courage, fixing it takes more.

Almost every significant breakthrough is the result of a courageous break with traditional ways of thinking.

Give us grace and strength to forbear and to persevere. Give us courage and gaiety and the quiet mind, spare to us our friends, soften to us our enemies.

If you want to conquer fear, don't sit home and think about it. Go out and get busy.

Here must all distrust be left behind; all cowardice must be ended.

No man will ever bring out the Presidency the reputation which carries him into it.

I've been absolutely terrified every moment of my life—and I've never let it keep me from doing a single thing I wanted to do.

There will be obstacles. There will be doubters. There will be mistakes. But with hard work, there are no limits.

You alone are enough. You have nothing to prove to anybody.

It does not take a majority of prevail... but rather an irate, tireless minority, keen on setting brushfires of freedom in the minds of men.

Constant effort and frequent mistakes are the stepping stones to genius.

Creativity is often blocked to trying to be perfect. Creativity is allowing yourself to make mistakes.

Feelings of worth can flourish only in an atmosphere where individual differences are appreciated, mistakes are tolerated, communication is open, and rules are flexible. The kind of atmosphere that is found in a nurturing family.

Knowledge rests not upon truth alone, but upon error also.