Marketing is actually selling multiplied - it's salesmanship in print, audio, or video, which is why you must learn selling before attempting marketing

Eben Pagan cites a story about an advertising agency defining marketing as 'salesmanship in print' and gives the example of successful direct mail campaigns where 'millions or tens of millions of the same letter' are sent out repeatedly, written by someone who 'really understood the psychology and the skill of selling'