Feynman: I am Feynman
Dirac: I am Dirac. (silence)
Feynman: It must be wonderful to be the discoverer of that equation.
Dirac: That was a long time ago. (Pause.) What are you working on?
Feynman: Mesons.
Dirac: Are you trying to discover an equation for them?
Feynman: It is very hard.
Dirac: One must try!