PISCES (Feb. 19-March 20): Ludwig Wittgenstein was a genius. His last book, which influenced many fields of thought, is one of the 20th century's most important philosophy tomes. Yet he was a big fan of foolishness. “If people did not sometimes do silly things,” he observed, “nothing intelligent would ever get done.” And: “Never stay up on the barren heights of cleverness, but come down into the green valleys of silliness.” One more: “Don’t be afraid of talking nonsense! But you must pay attention to your nonsense.” It's time to get smarter and wiser. How? Play.