Courage: being terrified but still going ahead and doing what needs to be done.

“The one who feels no fear is a fool. And the one who let’s fear rule him is a coward.” –Piers Anthony

“Courage is not the absence of fear, but rather the assessment that something else is more important than fear.” –Franklin D. Roosevelt

I must not fear. Fear is the mind-killer. Fear is the little-death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain. -Dune