He sounded like a man who had slept well and didn't owe too much money.

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 faster I write the better my output. If I'm going slow, I'm in trouble. It means I'm pushing the words instead of being pulled by them.

They don't want you until you have made a name, and by the time you have made a name, you have developed some kind of talent they can't use. All they will do is spoil it, if you let them.

There are two kinds of truth; the truth that lights the way and the truth that warms the heart. The first of these is science, and the second is art. Without art science would be as useless as a pair of high forceps in the hands of a plumber. Without science art would become a crude mess of folklore and emotional quackery.

If you don't leave, I'll get somebody who will.

Until you guys own your own souls you don't own mine. Until you guys can be trusted every time and always, in all times and conditions, to seek the truth out and find it and let the chips fall where they may—until that time comes, I have the right to listen to my conscience, and protect my client the best way I can. Until I'm sure you won't do him more harm than you'll do the truth good. Or until I'm hauled before somebody that can make me talk.