The hunt for Osama Bin Laden: "We do know of certain knowledge that he [Osama Bin Laden] is either in Afghanistan, or in some other country, or dead."
On the future: "I would not say that the future is necessarily less predictable than the past - I think the past was not predictable when it started."
On his colleagues: "Needless to say, the President is correct. Whatever it was he said." Or… "Secretary Powell and I agree on every single issue that has ever been before this administration except for those instances where Colin's still learning."
On unknowns: "I don't know what the facts are but somebody's certainly going to sit down with him and find out what he knows that they may not know, and make sure he knows what they know that he may not know." Or… "Reports that say that something hasn't happened are always interesting to me, because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns - the ones we don't know we don't know." Or…"I believe what I said yesterday...I don't know what I said, er, but I know what I think, and...well, I assume it's what I said."