The parable of the two wolves
A grandfather is talking to his grandson and he says that there are two wolves inside of us which are always at war with each other. One of them is a good wolf which represents things like kindness, self-control and love. The other is a bad wolf, which represents things like greed, hatred and jealousy.
The grandson stops and thinks about it for a second then he looks up at his grandfather and asks, “Grandpa, which one wins?”
The grandfather quietly replies, “The one you feed.”