The Man in the Arena by Theodore Roosevelt

It is not the critic who counts;
not the man who points out how the strong man stumbles,
or where the doer of deeds could have done them better.

The credit belongs to the man who is actually in the arena,
whose face is marred by dust and sweat and blood;
who strives valiantly, who errs,
who comes short again and again,
because there is no effort without error and shortcoming;
but he does actually strive to do the deeds;
he knows great enthusiasms, the great devotions;
he spends himself in a worthy cause;
he, at the best, ends with the triumph of high achievement,
and at the worst, if he fails, fails while daring greatly,
so that his place shall never be with those cold and timid souls who know neither victory nor defeat.