Success does not come always;
Failures fill our earthly days;
Should dejected be our heart?
Success is got by some art!

Failures shouldn’t discourage us;
Let’s delve not in past and fuss;
Renew attempts to get success;
Fear should not seize us in excess.

Failure is just some steps below,
The rung called success, dear fellow!
Despair shouldn’t rule life on earth,
For man is meant for feats since birth.

Dr John Celes

http://www.poemhunter.com/poem/keep-trying-without-a-lull/