There is one quote that I heard from a friend's dad when I was nine years old that has stuck with me through my life. Of course there were the times when I hated that it stuck with me but in the end I always knew the truth of it and realized the importance of understanding and believing. There is also a favorite scripture of mine that goes hand in hand with it and I'll share that too.
"Adversity is mandatory, misery is optional."
John 14:27 Peace I leave with you, my peace I give unto you: not as the world giveth, give I unto you. Let not your heart be troubled, neither let it be afraid.
What is your favorite?