Two and two make—?

“I guarantee,” said the Bishop, “to be able to teach geography or history, or even mathematics, in such a way as to leave the impression that there is a God or to teach these subjects in a different way which will leave the impression that there is no God at all.”—(The Bishop of Grimsby, in an address at Market Rasen Parish Church.—Lincolnshire Echo, July 2nd, 1941.)