In "Religion in the fiction of Poul Anderson" (Radio Free Thulcandra, issue 16, 1989), Glenn T. McDavid writes:
Christianity is an important part of western history, which Anderson's fiction draws on extensively. Whatever Anderson's own views may be (Miesel describes him as an agnostic. Against Time's Arrow, p. 11) his fiction agrees with the traditional Christian view of the ultimate fate of the physical universe. Christians are called upon to show love in the world, which is also the response of Anderson's best characters... Religious believers, especially Christians, are so often treated favorably by Anderson because their response to the world, when true to their beliefs, agrees with his.