Love interest nearly always weakens a mystery because it introduces a type of suspense that is antagonistic to the detective's struggle to solve the problem. It stacks the cards, and in nine cases out of ten, it eliminates at least two useful suspects. The only effective love interest is that which creates a personal hazard for the detective - but which, at the same time, you instinctively feel to be a mere episode. A really good detective never gets married.

The keynote of American civilization is a sort of warm-hearted vulgarity. The Americans have none of the irony of the English, none of their cool poise, none of their manner. But they do have friendliness. Where an Englishman would give you his card, an American would very likely give you his shirt.

When I left Merle was wearing a bungalow apron and rolling pie crust. She came to the door wiping her hands on the apron and kissed me on the mouth and began to cry and ran back into the house, leaving the doorway empty [...] I had a funny feeling as I saw the house disappear, as though I had written a poem and it was very good and I had lost it and would never remember it again. (p. 262)

She was the music heard faintly on the edge of sound.

There are no vital and significant forms of art; there is only art, and precious little of that.

A writer who is afraid to overreach himself is as useless as a general who is afraid to be wrong.

I've found that there are only two kinds that are any good: slang that has established itself in the language, and slang that you make up yourself. Everything else is apt to be passe before it gets into print.