"He had what my brother Walt used to call his Eureka Look, and he wanted to tell me that he thought he finally knew why Christ said to call no man Fool. (It was a problem that had been baffling him all week, because it sounded to him like a piece of advice, I believe, more typical of Emily Post than of someone busily about his Father's Business.) Christ had said it, Seymour thought I'd want to know, because there are no fools. Dopes, yes—fools, no."
January 1, 1970
https://en.wikiquote.org/wiki/Fools