According to this .pdf Lenin didn't exactly say it either; that Keynes gleaned it from an interview of Lenin.
So, banyon, you need to visit the grave of Keynes and pin a correction on him. That is after you write to Brainy Quote.
Bill Belichick learned to film signals of opponents from the former Chiefs, and Charger's coach Schottenheimer. Others like Edwards, Johnson and Cowher did too. They learned from the CHEATS and CHEATERS who still couldn't win.