This is a poem I just came across in the True Education Reader, Fourth Grade, published 1931. A good reminder for us all.

Try Again

If at first you don't succeed,
Try again.
'Tis a lesson all should heed--
Try, try again;
Let your courage then appear;
For if you will perservere,
You will conquer, never fear;
Try, try, try again.

Twice or thrice though you should fail,
Try again.
If at last you would prevail,
Try, try again.
When you strive, 'tis no disgrace
Though you fail to win the race.
Bravely, then, in such a case,
Try, try, try again.

If you find your task is hard,
Try again.
Time will surely bring reward;
Try, try again.
That which other folks can do,
Why, with patience, may not you?
Only keep this rule in view--
Try, try, try again!

-E. Hickson (adapted)