Money ... is always the great clue to what is happening in the world.

there is evil everywhere under the sun.

If you are to be Hercule Poirot, you must think of everything.

I always think loyalty's such a tiresome virtue.

Assumptions are dangerous things.

Poirot said placidly, “One does not, you know, employ merely the muscles. I do not need to bend and measure the footprints and pick up the cigarette ends and examine the bent blades of grass. It is enough for me to sit back in my chair and think. It is this – ” he tapped his egg-shaped head – “this, that functions!

But no artist, I now realize, can be satisfied with art alone. There is a natural craving for recognition which cannot be gain-said.