If

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 wait and not be tired by waiting
     Or being lied about don't deal in lies
Or being hated don't give way to hating
     And yet don't look too good, nor talk too wise

If you can dream and not make dream 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 bear to hear the truth you've spoken
    Twisted by knaves to make trap for fools
Or watch the things you gave your life to, broken
    And stoop and build them up with worn-out tools

If you can make one heap of all your winnings
     And risk it on one turn of pitch-and-toss,
And lose, and start again at your beginnings
     And never breath a word about your loss;
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 talk with crowds and keep your virtue,
     Or walk with kings - nor lose the common touch;
If neither foes nor loving friends can hurt you;
     If all men count with you, but none too much;
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!

~ Rudyard Kipling ~