My great concern is not whether you have failed, but whether you are content with your failure.Abraham Lincoln
The attempt to combine wisdom and power has only rarely been successful and then only for a short while.Albert Einstein
I think and think for months and years. Ninety-nine times, the conclusion is false. The hundredth time I am right.Albert Einstein
A life spent making mistakes is not only more honorable but more useful than a life spent in doing nothing.Bernard Shaw