Howard Joyce: Be flippant about your own crimes if you want to, but don't be flippant about mine!

- James Stephenson (as Howard Joyce) in The Letter (1940)

Howard Joyce: Strange that a man can live with a woman for ten years and not know the first thing about her.

- James Stephenson (as Howard Joyce) in The Letter (1940)

Leslie: With all my heart, I still love the man I killed.

- Bette Davis (as Leslie Crosbie) in The Letter (1940)

Robert Crosbie: I'll do whatever you think is right.
Howard Joyce: I don't think it's right, but I think it's expedient. Juries can sometimes be very stupid, and it's just as well not to worry them with more evidence than they can conveniently deal with.

- James Stephenson (as Howard Joyce) in The Letter (1940)

Robert Crosbie: If you love a person, you can forgive anything.

- Herbert Marshall (as Robert Crosbie) in The Letter (1940)