Actually, Equus, what Churchill is supposed to have said is that a rigid insistence on
not ending sentences with prepositions is "the sort of arrant pedantry up with which I shall not put."
At any rate, that's the quote Churchill is often given credit for. Apparently, however, there's some doubt about whether he actually said it, and, if so, the exact words he used to say it with. At least, that's what the guy at
http://www.wsu.edu/~brians/errors/churchill.html says, and he seems to know what he's speaking of.