The happy people are failures because they are on such good terms with themselves they don't give a damn.

One of the luckiest things that can happen to you in life is, I think, to have a happy childhood.

Lies--and again lies--it amazes me, the amount of lies we had told to us this morning."
"There are more still to discover," said Poirot cheerfully.

Good advice is always certain to be ignored, but that's no reason not to give it.

I've always believed in writing without a collaborator, because where two people are writing the same book, each believes he gets all the worry and only half the royalties.

Whatever makes people happy is a good thing.