I haven’t heard this one (I bet it’s apocryphal but meh, who cares):

A reader remembered Einstein, who said, “If my theory of relativity is proven correct, Germany will claim me as a German and France will declare that I am a citizen of the world. Should my theory prove untrue, France will say that I am a German and Germany will declare that I am a Jew.”

From Jay Nordlinger in The Corner, via RC2′s Google Reader.