Andrea Mitchell says both of them are early risers, with Greenspan spending up to two hours every day poring over work in his bathtub.

"He find that he is sort of sharpest and most focused in the early morning," she says.

Words of Wisdom

Details are few about what Greenspan intends to discuss in today's address.

Mitchell says her husband has provided her with few details but was pleased to be honored by the Harvard invitation, and the honorary degree that comes with it.

"I don't know the substance of his speech. I can only say that it is obviously a senior honor to be at Harvard and it's very clear he's looking forward to it with a great deal of anticipation," she says. "He feels honored, I'm sure, to be a part of a memorable occasion for all of the graduates and their friends and family."

Woodruff guesses that students may perhaps get a does of his wit.

"He has a wonderful sense of humor," Woodruff says. "Let me clarify that. He has a very dry sense of humor. He's someone who's always got the reaction that no one else would every think of. All I know is that I always laugh when I'm around him in a social setting."

His desk is said to be adorned with a plaque appropriate to his position: "The Buck Starts Here!" And so it will be for the former band-man-turned-economist-turned-commencement speaker. This unusual and powerful man has never had a problem with creativity.

Just don't ask about irrational exuberance.