Excerpts from “If” by Rudyard Kipling

If you can keep your head when all about you
  Are losing theirs and blaming it on you,
If you can trust yourself when all men doubt you,
  But make allowance for their doubting too;
If you can dream—and not make dreams your master;
  If you can think—and not make thoughts your aim;
If you can meet with Triumph and Disaster
  And treat those two impostors just the same;
If you can force your heart and nerve and sinew
  To serve your turn long after they are gone,
And so hold on when there is nothing in you
  Except the Will which says to them: ‘Hold on!’
If you can fill the unforgiving minute
  With sixty seconds’ worth of distance run,
Yours is the Earth and everything that’s in it,
  And—which is more—you’ll be a Man, my son!

Excerpts from “If” by Rudyard Kipling