"Hello. I'm Leonard Nimoy. The following tale of alien encounters is true. And by true, I mean false. It's all lies. But they're entertaining lies. And in the end, isn't that the real truth? The answer is...No."
(and from another classic episode)
"And let me say: May the Force be with you!
"Do you even know who I am?"
"I think I do. Weren't you one of the Little Rascals?"