Experience is a hard teacher because she gives the test first, the lesson afterward.

Experience is the worst teacher; it gives the test before presenting the lesson.

If you don't play to win, why keep score?

Some people are so busy in learning the tricks of the trade that they never learn the trade.

Don't throw the ball before you have it.

Experience is a hard teacher because she gives the test first, the lesson afterward.

Expectations tend to be self-fulfilling.