"You will never do anything in this world without courage. It is the greatest quality of the mind next to honor," and "Courage is the first of human virtues because it makes all other virtues possible".    Aristotle

I find the last part of this quote of Aristotle quite informative.

It most certainly requires courage to attempt anything worthwhile.

Imagine if you will, all that might have been, if timidity and cowardice had been overcome and the heroic in us had been allowed to emerge.