Josef Pieper asserts that it is more important that our thinking is complete, than that it is coherent. We should not leave things out because they threaten to augment inconsistencies and tensions. I explore the wisdom of Pieper's claim, by drawing out some parallels between the role of opposition and difference in theology, philosophy, and in psychoanalysis. I venture the thought that opposition and difference may be so central, because human beings are created in the image of God.