In “God is a Question, Not an Answer,” William Irwin explains his doubts about anyone who is certain that God exists or that God does not exist. “People who claim certainty about God worry me, both those who believe and those who don’t believe. They do not really listen to the other side of conversations, and they are too ready to impose their views on others. It is impossible to be certain about God.” It’s better to admit that we all live on a “continuum of doubt.”