Confidence is what you often have before fully understanding the situation.
"No greater thing is created suddenly, any more than a bunch of grapes or a fig. If you tell me that you desire a fig, I answer you that there must be time. Let it first blossom, then bear fruit, then ripen."
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."