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.
Before you read the “Outside The Lines” report, consider this:
Taping the opposing team’s sideline still isn’t banned; only taping the opposing team from the sideline is illegal.
Also remember this:
Taping the opposing team from the sideline wasn’t banned until 2006, yet the report cites examples as far back as 2000. ~NESN