" Well, er…it’s…well, it’s…it’s symbolic, Archchancellor.” “Ah?” The Senior Wrangler felt that something more was expected. He groped around in the dusty attics of his education. “Of…the leaves, d’y’see…they’re symbolic of…of green, d’y’see, whereas the berries, in fact, yes, the berries symbolize…symbolize white. Yes. White and green. Very…symbolic.” He waited. He was not, unfortunately, disappointed. “What of?” The Senior Wrangler coughed. “I’m not sure there has to be an of,” he said. “Ah? So,” said the Archchancellor, thoughtfully, “it could be said that the white and green symbolize a small parasitic plant?” “Yes, indeed,” said the Senior Wrangler. “So mistletoe, in fact, symbolizes mistletoe?” “Exactly, Archchancellor,” said the Senior Wrangler, who was now just hanging on. “Funny thing, that,” said Ridcully, in the same thoughtful tone of voice. “That statement is either so deep it would take a lifetime to fully comprehend every particle of its meaning, or it is a load of absolute tosh. Which is it, I wonder? "

― Terry Pratchett , Hogfather (Discworld, #20; Death, #4)