“From what I remember,” replied Crowley, thoughtfully, “– and we were never actually on what you might call speaking terms — He wasn’t exactly one for a straight answer. In fact, in fact, He’d never answer at all. He’d just smile, as if He knew something that you didn’t.”
“And of course that’s true,” said the angel. “Otherwise, what’d be the point?”

Terry Pratchett (1948-2015) English author

Good Omens, 6. “Saturday” (1990) [with Neil Gaiman]
    (Source)