Roger Ebert slips political commentary into the most surprising places. And beauty. And consequences. And other consequences. And notes on unnoticed moments in masterpieces. And, uh, the history of copyright law and why the matter is full of foolishness. All these things illustrate something important about great columnists: They absolutely disregard category and go where they will, with the support of fine and understanding editors. I was just thinking of how lucky I have been to have had editors like that — Fred, Skip, Cyndi, Barry. Life is good.