I have no idea if this is an actual Cherokee legend, but the wisdom is straightforward. As seen somewhere on the vastness of the web:
An old Cherokee sat down to teach his grandson about life.
"A fight is going on inside me," he said to the boy. "The same fight is going on inside you – and inside every other person, too."
"It is a terrible fight and it is between two wolves. One is evil – he is anger, envy, sorrow, regret, greed, arrogance, self-pity, guilt, resentment, inferiority, lies, false pride, superiority, and ego." He continued, "The other is good – he is joy, peace, love, hope, serenity, humility, kindness, benevolence, empathy, generosity, truth, compassion, and faith. These two wolves struggle for control. Sooner or later, one will win."
The grandson thought about it for a minute and then asked his grandfather, "Which wolf will win?"
The old Cherokee simply replied, "The one you feed."
Food for thought.