tell em what you re going to tell em; next, tell em; next, tell em what you told em /

Aristotle? Dale Carnegie? J. H. Jowett? Fred E. Marble? Royal Meeker? Henry Koster? Anonymous? Dear Quote Investigator: For many years I acquire been encouraged to split my speeches into three parts. Here are two versions of the guidance: [A] Tell the audience what you’re going to say, say it; then tell them what you’ve said. […]

Source: quoteinvestigator.com