You want beauty,' said Hercules Poirot. 'Beauty at any price. For me, it is truth. I want always truth.

Assumptions are dangerous things.

I don't go in for being sorry for people. For one thing it's insulting. One is only sorry for people when they're sorry for themselves. Self-pity is one of the biggest stumbling blocks in the world today.

It is a curious thought, but it is only when you see people looking ridiculous that you realize just how much you love them.

Every murderer is probably somebody's old friend.

If you confront anyone who has lied with the truth, he will usually admit it - often out of sheer surprise. It is only necessary to guess right to produce your effect.

If one sticks too rigidly to one's principles, one would hardly see anybody.