|Anonymous image from The Abraham Lincoln Blog.|
That's two classes per year (each presented twice, because Yale has too many young members of the "next generation of leaders" to fit into the classroom) to which he offers what exactly? Punctuating the solemnity of his partners' lectures the way he does the PBS broadcasts with self-deprecatory wisecracks and expressions of pious alarm? He can't presumably use the joke about "I only teach at schools I couldn't get into" more than once a year.
He also sits in on somebody else's classes once in a while, to expand his perspective, as we learn from "The Enlightenment Project" in today's Times: