
Rejoinder when told that he couldn't talk about physics, because "nobody [at this table] knows anything about it."
Part 5: "The World of One Physicist", "Alfred Nobel's Other Mistake", p. 310.
Quoted in Handbook of Economic Growth (2005) by Philippe Aghion and Steven N. Durlauf.
Surely You're Joking, Mr. Feynman! (1985)