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

Wonderful things, horses. Never know what they will do, or won't do.

For in the long run, either through a lie, or through truth, people were bound to give themselves away.

Speech ... is an invention of man's to prevent him from thinking.

Ah, but life is like that! It does not permit you to arrange and order it as you will. It will not permit you to escape emotion, to live by the intellect and by reason! You cannot say, 'I will feel so much and no more.' Life, Mr. Welman, whatever else it is, is not reasonable. [Hercule Poirot]

And, of course, afterwards -- one always hears these things afterwards, so much better if one heard them before -- we found out that dozens of empty brandy bottles were taken out of the house every week!

In old days the public didn't really mind much about accuracy, but nowadays readers take it upon themselves to write to authors on every possible occasion, pointing out flaws.