From Alicia Dearn on Facebook:
Emperor Huang of China circa 220 BC, probably: “We’re going to build a wall. It’ll be so huge, you can see it from space. And the Mongols are going to pay for it.”
Genghis Khan circa 1215 AD, probably: “Walls don’t work, jackasses. Oh and I’m emperor now.”
As the phrase goes: Jesus saves, Moses invests, but the Mongol hordes.