“The cheaper the crook, the gaudier the patter.”

“My way of learning is to heave a wild and unpredictable monkey-wrench into the machinery.”

“Yes,' Spade growled. 'And when you're slapped you'll take it and like it.' He released Cairo's wrist and with a thick open hand struck the side of his face three times savagely.”

“When you write, you want fame, fortune and personal satisfaction. You want to write what you want to write and feel it's good, and you want this to go on for hundreds of years. You're not likely ever to get all these things, and you're not likely to give up writing and commit suicide if you don't, but that is -- and should be -- your goal. Anything else is kind of piddling.”

“Now I pass up about twenty-five or thirty thousand of honest gain because I like being a detective, like the work. And liking work makes you want to do it as well as you can. Otherwise there’d be no sense to it. That’s the fix I am in. I don’t know anything else, don’t enjoy anything else, don’t want to know or enjoy anything else. You can’t weight that against any sum of money. Money’s good stuff. I haven’t anything against it.”

“The problem with putting two and two together is that sometimes you get four, and sometimes you get twenty-two.”

“You're drunk, and I'm drunk, and I'm just exactly drunk enough to tell you anything you want to know. That's the kind of girl I am. If I like a person, I'll tell them anything they want to know. Just ask me. Go ahead, ask me.”