A Quote by Native American Proverb on two wolves

A Native American boy was talking with his grandfather.

"What do you think about the world situation?" he asked.

The grandfather replied, "I feel like wolves are fighting in my heart.
One is full of anger and hatred; the other is full of love, forgiveness, and peace."

"Which one will win?" asked the boy.

To which the grandfather replied, "The one I feed."