I double-checked and thought I had indeed made a mistake in attribution here.

However, while Richelieu is the most commonly cited as the source of the quote, the source is actually somewhat disputed, and has been attributed to various people (who may or may not have been (mis)quoting Richelieu themselves), including -apparently- Voltaire.

So I get off on a technicality :-/ . Going forward, I do promise to be more careful with attribution of quotes in future.