There's a lot of good ones out there. My personal favorite is this one from Dr. Strangelove.
"I think it would be extremely naive of us, Mr. President, to imagine that these new developments are going to cause any change in Soviet expansionist policy. I mean, we must be... increasingly on the alert to prevent them from taking over other mineshaft space, in order to breed more prodigiously than we do, thus, knocking us out in superior numbers when we emerge! Mr. President, we must not allow... a mineshaft gap!"