God is the producer of immortality; and whoever has doubts of immortality is written down as an atheist without farther trial.
 William James, The Varieties of Religious Experience (1902). copy citation

Context

“which most of us would assign as the first difference which the existence of a God ought to make would, I imagine, be personal immortality. Religion, in fact, for the great majority of our own race means immortality, and nothing else. God is the producer of immortality; and whoever has doubts of immortality is written down as an atheist without farther trial. I have said nothing in my lectures about immortality or the belief therein, for to me it seems a secondary point. If our ideals are only cared for in “eternity,” I do not see why we might not be willing to resign their care to other hands than ours.” source