A good rule for writers: do not explain overmuch.

She had no mercy. He looked at her neck and thought how he would like to jab it with the knife he had for his muffin. He knew enough anatomy to make pretty certain of getting the carotid artery. And at the same time he wanted to cover her pale, thin face with kisses.

We do not write because we want to; we write because we have to.

You can never know enough about your characters

You Europeans know nothing about America. Because we amass large fortunes you think we care for nothing but money. We are nothing for it; the moment we have it we spend it, sometimes well, sometimes ill, but we spend it. Money is nothing to us; it's merely the symbol of success. We are the greatest idealists in the world; I happen to think that we've set our ideal on the wrong objects; I happen to think that the greatest ideal man can set before himself is self-perfection.

Art is a manifestation of emotion, and emotion speaks a language that all may understand.

Was it necessary to tell me that you wanted nothing in the world but me?' The corners of his mouth drooped peevishly. Oh, my dear, it's rather hard to take quite literally the things a man says when he's in love with you.' Didn't you mean them?' At the moment.