I am not mad. I am eccentric perhaps--at least certain people say so; but as regards my profession. I am very much as one says, 'all there.

Very few of us are what we seem.

there is no fanatic like a religious fanatic.

I believe, Messieurs, in loyalty---to one's friends and one's family and one's caste.

There are more important things than finding the murderer. And justice is a fine word, but it is sometimes difficult to say exactly what one means by it. In my opinion, the important thing is to clear the innocent. - Hercule Poirot

Achievement brings with it its own anticlimax.

One doesn't recognize the really important moments in one's life until it's too late.