The Churchill anecdote - I make no claim to any insider knowledge, and these pithy sayings often get attached to some popular or at least well-known figure. The main point, of course, is that the construction "up with which I will not put" is a particularly effective illustration of the silliness of the "Thou shalt not end a sentence with a preposition" commandment - and by extension, many other prissy notions concerning the English language. Of course, I don't mean to suggest that any such prissy notions are being promoted on this thread; no, sir!