An optimist created airplanes. A pessimist created seat belts.
To make a mistake is human. To really screw things up requires a computer.
"Many people fail in life, not for lack of ability or brains, or even courage, but simply because they have never organized their energies around a goal."
Why should you never fly with Peter Pan?
Because you'll never never land.
"A successful man is one who can lay a firm foundation with the bricks that others have thrown at him."