I've always believed in writing without a collaborator, because where two people are writing the same book, each believes he gets all the worries and… - Agatha Christie

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.

Love can be a very frightening thing.”
“That is why most great love stories are tragedies.

A man when he is making up to anybody can be cordial and gallant and full of little attentions and altogether charming. But when a man is really in love he can't help looking like a sheep.