“To swipe the immortal lines uttered by Sam Spade in The Maltese Falcon, a great mystery should take "the lid off life and let [you] look at the works.”

“He felt like somebody had taken the lid off life and let him see the works.”

“I couldn't be fonder of you if you were my own son. But, well, if you lose a son, its possible to get another. There's only one Maltese Falcon.”

“I hope they don't hang you, precious, by that sweet neck. Yes, angel, I'm gonna send you over. The chances are you'll get off with life. That means if you're a good girl, you'll be out in 20 years. I'll be waiting for you. If they hang you, I'll always remember you. (Sam Spade to Brigid O'Shaughnessy)”

“Brigid O'Shaughnessy: “I haven't lived a good life. I've been bad, worse than you could know.” Sam Spade “You know, that's good, because if you actually were as innocent as you pretend to be, we'd never get anywhere”

“When a man's partner is killed he's supposed to do something about it. It doesn't make any difference what you thought of him. He was your partner and you're supposed to do something about it. Then it happens we were in the detective business. Well, when one of your organization gets killed it's bad business to let the killer get away with it. It's bad all around-bad for that one organization, bad for every detective everywhere. Sam Spade”

“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.”