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 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 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 breathe a word about your loss; 
If you can force your heart and nerve and sinew 
To serve your turn long after they are gone,…

Yours is the Earth and everything that’s in it,
And-which is more-you’ll be a Man, my son.

(Source: butwhoamitodream)