The simplest explanation is always the most likely.

There is no greater mistake in life than seeing things or hearing them at the wrong time.

There are questions that you don't ask because you're afraid of the answers to them.

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

Assumptions are dangerous things.

Does the real thing ever have the perfection of a stage performance?

Sometimes I feel sure he is as mad as a hatter and then, just as he is at his maddest, I find there is a method in his madness.