Why Bonhoeffer made the sign of the cross

Reading Letters and Papers from Prison, I was surprised to discover Dietrich Bonhoeffer used the sign of the cross in his daily prayers. “I’ve found that following Luther’s instruction to ‘make the sign of the cross’ at our morning and evening prayers is . . . most useful,” he said in one letter. “There is something objective about it. . . .” Growing up evangelical, I always understood signing oneself to be…