[I]f self-deception has to be risked anyhow, it might be better to risk it to take a broad view than a narrow view. It may be foolish, perhaps even dangerous, to wander too far from the highway and then be the dupe of fantasies; but it may be even more foolish, even more dangerous in the end, to be so determined to keep to the well-tested road that you wear blinkers, see nothing of the surrounding landscape, and find the road itself, all that you can see, more and more wearisome and detestable.