So the parable goes, an elder speaking with his granddaughter says, "In life, there are two wolves inside of us that are always at battle. One is a good wolf, which represents things like kindness, bravery, and love. And the other is a bad wolf, which represents things like greed, hatred, and fear. " The granddaughter stops and thinks about it for a second. She looks up at her grandfather and says, "Well, which one wins?" And the grandfather says, "The one you feed." When host Eric Zimmer was 24 years old, he was homeless and addicted to heroin. He made his way through addiction...