“Delighted customers are the only advertisement everyone believes.”

The Kingdom (1925)

Interview on The David Frost Show (14 June 1969)
Context: We're trying to sell peace, like a product, you know, and sell it like people sell soap or soft drinks. And it's the only way to get people aware that peace is possible, and it isn't just inevitable to have violence. Not just war — all forms of violence. People just accept it and think 'Oh, they did it, or Harold Wilson did it, or Nixon did it,' they're always scapegoating people. And it isn't Nixon's fault. We're all responsible for everything that goes on, you know, we're all responsible for Biafra and Hitler and everything. So we're just saying "SELL PEACE" — anybody interested in peace just stick it in the window. It's simple but it lets somebody else know that you want peace too, because you feel alone if you're the only one thinking 'wouldn't it be nice if there was peace and nobody was getting killed.' So advertise yourself that you're for peace if you believe in it.

As cited in: Jay Conrad Levinson (1999), Mastering Guerrilla Marketing. p. 218
Marketing Management: Analysis, Planning, Implementation and Control, 1967

Source: 1940s-1950s, Administrative Behavior, 1947, p. 114.

Source: Daring Greatly: How the Courage to Be Vulnerable Transforms the Way We Live, Love, Parent, and Lead

Newsweek (1973-12-24).

Of Molecules and Men (1966)

Alex d'Arbeloff cited in: Shōji Shiba, New American TQM. Productivity press, 1993. p. 315