There is a story about a Navajo grandfather who once told his grandson, "Two wolves live inside me. One is the bad wolf, full of greed and laziness, full of anger and jealousy and regret. The other is the good wolf, full of joy and compassion and willingness and a great love for the world. All the time, these wolves are fighting inside me.
The boy said, "Which wolf will win?"
The grandfather answered, "The one I feed."