“The curious thing about being told to sleep on it – a phrase which here means, as I’m sure you know, ‘to go to bed thinking about something and reach a conclusion in the morning’ – is that you usually can’t. If you are thinking over a dilemma, you are likely to toss and turn all night long, thinking over terrible things that can happen and trying to imagine what in the world you can do about it, and these circumstances are unlikely to result in any sleeping at all.”
