It's always too early to quit.
You never know what motivates you.
Without hard work, nothing grows but weeds.
Who seeks shall find.
If you're going through hell, keep going.
Never complain and never explain.
The secret of getting ahead is getting started.
To be a good loser is to learn how to win.
Always desire to learn something useful.
The wise does at once what the fool does at last.
I pick projects according to how fascinating they are to me, and it has resulted in a broad reach. My records are actually in five different sports: balloons, airplanes, airships, gliders, and sailboats.