THE EYE WILL SELDOM SEE WHAT THE MIND DOES NOT ANTICIPATE, a sign in the men’s room in one of the top-secret buildings warned. Above which one of the physicists had written “Isn’t this The 1st Principle of Magic?” Fos thought it was. Even though he knew he ought to worry more, he knew that if he harried every motive, guarded every move, that he might be safer, sure. But then he’d miss the magic—wouldn’t he?
