A man's dreams are an index to his greatness.
I like this quote. I once went to a conference and heard a very wise man speak (actually, I'm fortunate to have had that happen to me quite a bit). One thing that he really drove into our heads was in the importance of dreaming big. Like really big. Bigger than is realistic, bigger than is practical and bigger than you ever think is going to happen. It's important to dream really, really big. Because if you don't push yourself and think big, you ain't going to accomplish anything.