If you're not tough it's hard to survive in this world; and if you're not kind then you don't deserve to survive.

The perfect detective story cannot be written. The type of mind which can evolve the perfect problem is not the type of mind that can produce the artistic job of writing.

The most durable thing in writing is style, and style is the most valuable investment a writer can make with his time. It pays off slowly, your agent will sneer at it, your publisher will misunderstand it, and it will take people you have never heard of to convince them by slow degrees that the writer who puts his individual mark on the way he writes will always pay off.

It was about eleven o'clock in the morning, mid October, with the sun not shining and a look of hard wet rain in the clearness of the foothills. I was wearing my powder-blue suit, with dark blue shirt, tie and display handkerchief, black brogues, black wool socks with dark little clocks on them. I was neat, clean, shaved and sober, and I didn't care who knew it. I was everything the well-dressed private detective ought to be. I was calling on four million dollars.

A good title is the title of a successful book.

From 30 feet away she looked like a lot of class. From 10 feet away she looked like something made up to be seen from 30 feet away.

You don't get rich, you don't often have much fun. Sometimes you get beaten up or shot at or tossed into the jail house. Once in a long while you get dead. Every other month you decide to give it up and find some sensible occupation while you can still walk without shaking your head. Then the door buzzer rings and you open the inner door to the waiting room and there stands a new face with a new problem, a new load of grief, and a small piece of money.