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

“A man who drinks too much on occasion is still the same man as he was sober. An alcoholic, a real alcoholic, is not the same man at all. You can't predict anything about him for sure except that he will be someone you never met before.”

“down these mean streets a man must go who is not himself mean, who is neither tarnished nor afraid. He is the hero; he is everything. He must be a complete man and a common man and yet an unusual man. He must be, to use a rather weathered phrase, a man of honor—by instinct, by inevitability, without thought of it, and certainly without saying it. He must be the best man in his world and a good enough man for any world. “He will take no man’s money dishonestly and no man’s insolence without a due and dispassionate revenge. He is a lonely man and his pride is that you will treat him as a proud man or be very sorry you ever saw him. “The story is this man’s adventure in search of a hidden truth, and it would be no adventure if it did not happen to a man fit for adventure. If there were enough like him, the world would be a very safe place to live in, without becoming too dull to be worth living in.”

“Common sense is the guy who tells you that you ought to have had your brakes relined last week before you smashed a front end this week. Common sense is the Monday morning quarterback who could have won the ball game if he had been on the team. But he never is. He's high up in the stands with a flask on his hip. Common sense is the little man in a grey suit who never makes a mistake in addition. But it's always someone else's money he's adding up.”

“Maybe I can quit drinking one of these days. They all say that, don't they?""It takes about three years.""Three years?" He looked shocked. "Usually it does. It's a different world. You have to get used to a paler set of colors, a quieter lot of sounds. You have to allow for relapses. All the people you used to know well will get to be just a little strange. You won't even like most of them, and they won't like you too well.”

“In everything that can be called art there is a quality of redemption. It may be pure tragedy, if it is high tragedy, and it may be pity and irony, and it may be the raucous laughter of the strong man. But down these mean streets a man must go who is not himself mean, who is neither tarnished nor afraid.The detective in this kind of story must be such a man. He is the hero; he is everything. He must be a complete man and a common man and yet an unusual man. He must be, to use a rather weathered phrase, a man of honor -- by instinct, by inevitability, without thought of it, and certainly without saying it. He must be the best man in his world and a good enough man for any world. I do not care much about his private life; he is neither a eunuch nor a satyr; I think he might seduce a duchess and I am quite sure he would not spoil a virgin; if he is a man of honor in one thing, he is that in all things.He is a relatively poor man, or he would not be a detective at all. He is a common man or he could not go among common people. He has a sense of character, or he would not know his job. He will take no man's money dishonestly and no man's insolence without due and dispassionate revenge. He is a lonely man and his pride is that you will treat him as a proud man or be very sorry you ever saw him. He talks as the man of his age talks -- that is, with rude wit, a lively sense of the grotesque, a disgust for sham, and a contempt for pettiness.The story is the man's adventure in search of a hidden truth, and it would be no adventure if it did not happen to a man fit for adventure. He has a range of awareness that startles you, but it belongs to him by right, because it belongs to the world he lives in. If there were enough like him, the world would be a very safe place to live in, without becoming too dull to be worth living in.”

“Then she laughed. It was almost a racking laugh. It shook her as the wind shakes a tree. I thought there was puzzlement in it, not exactly surprise, but as if a new idea had been added to something already known and it didn't fit. Then I thought that was too much to get out of a laugh.”