The man who has no problems is out of the game.

A failure is a man who has blundered, but is not able to cash in the experience.

The man who knows it can't be done counts the risk, not the reward.

The world is moving so fast these days that the man who says it can't be done is generally interrupted by someone doing it.

Failure / The man who can tell others what to do and how to do it, but never does it himself.

A conservative is a man who is too cowardly to fight and too fat to run.