David Hume, a great philosopher, in his “History of England” — he wrote a huge history of England — there’s a chapter devoted to Isaac Newton, a full chapter. He describes Newton as, you know, the greatest mind that ever existed, and so on and so forth. He said Newton’s great achievement was to draw the veil away from some of the mysteries of nature — namely, his theory of universal gravitation and so on — but to leave other mysteries hidden in ways we will never understand. Referring to: What’s the world like? We’ll never understand it. He left that as a permanent mystery. Well, as far as we know, he was right.