to know and not to do is not to know

Etymology:

• The origin of the proverb “actions speak louder than words” dates all the way back to the 1550s and to several similar proverbs in The Bible. It began with different wording and has changed throughout time. It was first recorded by a French writer named Michel de Montaigne. His exact words were, “Saying is one thing and doing is another.” The exact phrase "Your actions speak so loudly that your words I cannot hear" and/or "to know and not to do is not to know" are known to have been quoted by Ralph Waldo Emerson in his essay on self-reliance, but I could not find it on the internet at the time of this writing to know his exact quotes.