I've always been fascinated by these misattributions of wise/witty sayings to famous figures. The words aren't allowed to stand on their own, they have to be vouched for by a suitably impressive and high status person.
My favorite is how, even in the realm of conspiracies that Shakespeare didn't write his plays, the posited true author is invariably another famous Elizabethan personality, e.g. Francis Bacon.
God forbid the Shakespeare plays were actually written by some random nobody.