I do not regard advertising as entertainment or an art form, but as a medium of information.
David OgilvyThe general advertisers and their agencies know almost nothing for sure, because they cannot measure the results of their advertising. They worship at the altar of creativity, which really means 'originality': The most dangerous word in the lexicon of advertising
David OgilvyThe only marketers who know what the hell they're doing are those who have worked in sales
David Ogilvy