Only "CAN" can do it...!!!

I'm astonished by looking at this poem... How the poet could think so winsome... ???

If you can keep your head when all about you
Are loosing 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, or 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 these two imposters just the same;
If you can bear to hear the truth you’ve spoken
Twisted by knaves to make a 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 breathe a word about your loss;
If you can force your heart and never and sinew
To serve your long after they are gone,
And so hold on when there is nothing in you
Except the will that says to them: ‘Hold on!’

If you can walk with crowds and keep your virtue,
Or walk with kings-nor lose the common touch;
If neither foes nor living friends can hurt you,
If all men count with you, but not too much;
If you can fill the unforgiving minute,
With sixty seconds worth of distance run,
Yours is earth and everything in it,
And-, which is more-you‘ll be a Man, my son!