Dirac and Oppenheimer spent some time together in Göttingen. The two young physicists from different parts of the world had become good friends. In one of these days, Dirac noticed that Oppenheimer wrote poetry.
Dirac asserted, "Robert, I do not understand how a man can work on the frontiers of physics and write poetry at the same time."
Paul Dirac, Robert Oppenheimer Poetry Anecdote
"Why not?" Oppenheimer asked.
"In physics, you want to tell something that nobody knew before, in words which everyone can understand. In poetry, however, you go on to describe something that everybody knows about, in incomprehensible ways."
Oppenheimer was left too confused to respond to that.
Dirac went on to say, "The two are incompatible!"