"Let us march against Philip"

"The Father of Advertising" David Ogilvy in his book "Ogilvy on Advertising" says that he doesn't consider advertising as entertainment or a form of art, but as a medium of information! More specifically he quotes "When I write an advertisement, I don't want you to tell me that you find it creative, I want you to find it so interesting that you buy the product."
When Greek statesman Aeschines spoke to his people urging them to unite and defend independence against Philip II of Macedon, they said "How well he speaks." But it was Demosthenes' speech that made people say..."Let us march against Philip."