The one and only
street_show posted this quote in his journal a little while back and I really liked it, so I stole it. :-D
"Brick walls are not there to keep us out, they're there to show us how badly we want things."
~~Randy Pausch (writer of The Last Lecture)
He posted this one too, which I shall also steal, though I don't know who its by...
"You do not develop courage by being happy in your relationships every day. You develop it by surviving difficult times and challenging adversity."