3. Thomas Jefferson. It’s almost impossible to define Jefferson’s subtle religious views in a few words. As he once put it, “I am a sect by myself, as far as I know.” But one thing is clear: His skepticism of traditional Christianity is well established. Our third president did not believe in the Trinity, the virgin birth, the divinity of Jesus, the resurrection, original sin and other core Christian doctrines. He was hostile to many conservative Christian clerics, whom he believed had perverted the teachings of that faith.