How we cite our quotes: All quotations are from The Maltese Falcon.
Quote #10
SPADE: You never played square with me for half an hour at a stretch since I've known you!
For a large part of the movie, it seems that Spade admires Brigid for her ability to lie. But once the lie begins to affect him, he's not so fond of it anymore. He sees that she is willing to lie in a way that might hurt him, and he's not willing to risk that by continuing a relationship with her.