The trouble with many copywriters in general agencies are that they don't really think in terms of selling. They have never written direct-response; they have never tasted blood
David OgilvyI don't know the rules of grammar... If you're trying to persuade people to do something, or buy something, it seems to me you should use their language, the language they use every day, the language in which they think. We try to write in the vernacular.
David Ogilvy