Even a mistake may turn out to be the one thing necessary to a worthwhile achievement.

This is the mark of a really admirable man: steadfastness in the face of trouble.

The bravest sight in the world is to see a great man struggling against adversity.

Life is a series of experiences, each one of which makes us bigger, even though sometimes it is hard to realize this. For the world was built to develop character, and we must learn that setbacks and griefs which endure help us in our march forward.

He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.

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.

Mistakes are a fact of life. It is the response to error that counts.

The successful man will profit from his mistakes and try again in a different way.

Sometimes when you innovate, you make mistakes. It is best to admit them quickly, and get on with improving your other innovations.

The opposite is beneficial; from things that differ comes the fastest fairest attunement; all things are born through strife.

Be bold. If you're going to make an error, make a doozy, and don't be afraid to hit the ball.

All men make mistakes, but a good man yields when he knows he knows his course is wrong and repairs the evil. The only crime is pride.