You gave too much rein to your imagination. Imagination is a good servant, and a bad master. The simplest explanation is always the most likely.

People who can be very good can be very bad too.

I specialize in murders of quiet, domestic interest.

Everyone likes talking about himself. - Hercule Poirot

If I were at any time to set out on a career of deceit, it would be of Miss Marple that I should be afraid.

I am not one to rely upon the expert procedure. It is the psychology I seek, not the fingerprint or the cigarette ash.

Our weapon is our knowledge. But remember, it may be a knowledge we may not know that we possess.