I guess God knew that dualistic thinking would be the direction religion would take. So the Bible says right at the beginning, “Don’t do it!” The word of God is trying to keep us from religion’s constant temptation and failure—a demand for certitude, an undue need for perfect explanation, resolution, and answers, which is, by the way, the exact opposite of faith. Such dualistic thinking (preferring a false either/or to an always complex reality) tends to create arrogant and smug people instead of humble and loving people. – Richard Rohr