“Come to the edge.”
“We can't. We're afraid.”
“Come to the edge.”
“We can't. We will fall!”
“Come to the edge.” 
 And they came.
 And he pushed them. 
 And they flew.

  Guillaume Apollinaire,   1880-1918

Courage is not the absence of fear, but rather the judgement that something else is more important than fear.  ~Ambrose Redmoon

Only those who will risk going too far can possibly find out how far one can go.    

T. S. Eliot