Content Marketing

I have come to the conviction that if you cannot translate your thoughts into uneducated language, then your thoughts were confused. Power to translate is the test of having really understood one's own meaning.

—C.S. Lewis

The Rule of One for copywriting:

You have one reader. One big idea. One promise. And one offer.

Source: unknown person who is no longer alive, probably in advertising and direct response copywriting in the 1920’s.