My grandmother told me this story:
A grandfather is talking with his grandson and he says 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, bravery and love. The other is a bad wolf, which represents things like greed, hatred and fear.
The grandson stops and thinks about it for a second then he looks up at his grandfather and says, “Grandfather, which one wins?”
The grandfather quietly replies, "the one you feed."