As our readers know, I make it a habit to fact check quotes for accuracy.  Snopes has already investigated the words below.

Those words are plausible, but not verifiable.

But they do seem to be at the very least apocryphal.  I prefer a definition for apocryphal that has always struck me as more satisfying, rather than the dictionary (or theological) definitions.  That more colloquial definition is that if it isn't strictly true or accurate, it could be true and SHOULD be true, that the statement in question captures something of value and validity in spite of origins.