play a sucker to catch a sucker – seem dumber than your mark – law 21 – #48laws by robert greene

Law 21

No one likes feeling stupider than the next person. The trick, then, if to make your victims feel smart – and not just smart, but smarter than you are. Once convinced of this, they will never suspect that you may have ulterior motives. –{{Robert Greene}}, {{The 48 Laws of Power}} (review)