People claim that their secular outlook is simply what was left after science and reason subtracted their former belief in the supernatural. Once that superstition was gone, they were able to see things that had been there all along—that reason alone can establish truth, and the “humanistic values” of equality and freedom. However, each of these ideas is a new belief, a value-laden commitment that can’t be empirically proven. To move from religion to secularism is not so much a loss of faith as a shift into a new set of beliefs and into a new community of faith, one that draws the lines between orthodoxy and heresy in different places. — Timothy Keller (from, Making Sense of God: An Invitation to the Skeptical)