Life shrinks or expands in proportion to one's courage. -Anais Nin
and
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. - Bene Gesserit Litany Against Fear - From Frank Herbert's Dune Book Series
The second, sounds corny, helped me make it through SERE school. (Survival, Evasion, Resistance, and Escape).
"Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, chocolate in one hand, martini in the other, body thoroughly used up, totally worn out, and screaming,'WOO HOO! What a ride!'"