William Bernbach was an American advertising creative director. He was one of the three founders in 1949 of the international advertising agency Doyle Dane Bernbach. He directed many of the firm's breakthrough ad campaigns and had a lasting impact on the creative team structures now commonly used by ad agencies.
In communications, familiarity breeds apathy.
The most powerful element in advertising is the truth.
Advertising is fundamentally persuasion and persuasion happens to be not a science, but an art.
Word of mouth is the best medium of all.
I warn you against believing that advertising is a science.