I don't know the key to success, but the key to failure is trying to please everybody.
Bill Cosby, American comedian
Many a man has finally succeeded only because he has failed after repeated efforts.
If he had never met defeat he would never have known any great victory.
Orison Marden, American writer
You may be disappointed if you fail, but you are doomed if you don't try.
Beverly Sills, American soprano
Whatever you are from nature, keep to it; never desert your own line of talent.
Be what nature intended you for, and you will succeed;
be anything else, and you will be ten thousands times worse than nothing.
Sydney Smith, English writer
Do not let yourselves be discouraged or embittered by the smallness of the success you are likely to achieve in trying to make life better.
You certainly would not be able, in a single generation, to create an earthly paradise.
Who could expect that?
But, if you make life ever so little better, you will have done splendidly, and your lives will have been worthwhile.
Arnold Toynbee, British historian