Once the Wind came to have a false pride of his strength- so much that he challenged the strength of the Sun.
The Son tried to smile away the Wind's challenge but the Wind insisted on a trial of strength. The trial was to be upon a traveler.
He, who would make the traveler put off his coat, was to be the winner. The Wind had the first attempt. He gathered all his force and came down upon the man trying to blow off his coat off his body.
But the man felt colder and wrapped it even harder round himself. Now it was the Sun's turn. The Sun shined brightly. As obvious, the man felt quite hot and put off his coat.
So, the Sun came out to be a winner.