The only time you can't afford to fail is the last time you try.

Charles Kettering

Failure is the condiment that gives success its flavor.

Truman Capote

If we had no Winter, the spring would not be so pleasant; If we did not sometimes taste the adversity, prosperity would not be so welcome.

Anne Bradstreet

Victory has a thousand fathers but defeat is an orphan.

John F. Kennedy

Eighty percent of success is showing up.

Woody Allen