there is no fanatic like a religious fanatic.

I'm sorry, but I do hate this differentiation between the sexes. The modern girl has a thoroughly businesslike attitude to life! That sort of thing. It's not a bit true! Some girls are businesslike and some aren't. Some men are sentimental and muddle-headed, others are clear-headed and logical. There are just different types of brains.

It is ridiculous to set a detective story in New York City. New York City is itself a detective story.

I always think loyalty's such a tiresome virtue.

The lure of the past came up to grab me. To see a dagger slowly appearing, with its gold glint, through the sand was romantic. The carefulness of lifting pots and objects from the soil filled me with a longing to be an archaeologist myself.

Ah, but life is like that! It does not permit you to arrange and order it as you will. It will not permit you to escape emotion, to live by the intellect and by reason! You cannot say, 'I will feel so much and no more.' Life, Mr. Welman, whatever else it is, is not reasonable. [Hercule Poirot]

One of the luckiest things that can happen to you in life is, I think, to have a happy childhood.