No persons are more frequently wrong, than those who will not admit they are wrong.

To make no mistakes is not in the power of man; but from their errors and mistakes the wise and good learn wisdom for the future.

Failure comes only when we forget our ideals and objectives and principles.

You cannot measure a man by his failures. You must know what use he makes of them. What did they mean to him. What did he get out of them.

No one that ever lived has ever had enough power, prestige, or knowledge to overcome the basic condition of all life - you win some and you lose some.

When defeat comes, accept it as a signal that your plans are not sound, rebuild those plans, and set sail once more toward your coveted goal.

Power corrupts. Absolute power is kind of neat.

No man ever became great or good except through many and great mistakes.

If we were faultless we should not be so much annoyed by the defects of those with whom we associate.

Sometimes a noble failure serves the world as faithfully as a distinguished success.