A hero is no braver than an ordinary man, but he is brave five minutes longer. Ralph Waldo Emerson

A hero is no braver than an ordinary man, but he is brave five minutes longer. - Ralph Waldo Emerson 

If we take the generally accepted definition of bravery as a quality which knows no fear, I have never seen a brave man. All men are frightened. The more intelligent they are, the more they are frightened. - George S. Patton 

  Neither a wise man nor a brave man lies down on the tracks of history to wait for the train of the future to run over him. - Dwight D. Eisenhower 

Further reading: What to Do When Your Whole World is Falling Apart