How could you," began [George] Mackey, "how could you, a mathematician, a man devoted to reason and logical proof ... how could you believe that extraterrestials are sending you messages? How could you believe that you are being recruited by aliens from outer space to save the world? How could you ...?"
Nash looked up at last and fixed Mackey with an unblinking stare as cool and as dispassionate as that of any bird or snake."Because," Nash said slowly in his soft, reasonable drawl, as if talking to himself, "the ideas I had about supernatural beings came to me the same way that my mathematical ideas did. So I took them seriously."
Sylvia Nasar A Beautiful Mind (Faber and Faber: London, 1998; p. 11)