A fight is going on inside me

An old Cherokee is teaching his grandson about life. "A fight is going on inside me," he said to the boy. "It is a terrible fight between two wolves.
"One is evil - he is anger, envy, sorrow, greed, regret, lies, self-pity, arrogance, guilt, resentment, inferiority, false pride, superiority and ego.
"The other is good - he is joy, peace, love, hope, serenity, humility, kindness, benevolence, empathy, generosity, truth, compassion and faith.
"This same fight is going on inside you -- and inside every other person, too."
The grandson thought for a minute and then asked his grandfather, "Which wolf will win?"
The old Cherokee replied, "The one you feed."