I don't know. I don't know at all. And that's what's frightening the life out of me. To have no idea.... - Agatha Christie

What governs one's choice of memories? Life is like sitting in a cinema. Flick! Here am I, a child eating éclairs on my birthday. Flick! Two years have passed and I am sitting on my grandmother's lap, being solemnly trussed up as a chicken just arrived from Mr Whiteley's, and almost hysterical with the wit of the joke. Just moments — and in between long empty spaces of months or even years.

Maybe it is because I am an old man, but I find, M. Poirot, that there is something about the defenselessness of youth that moves me to tears. Youth is so vulnerable. It is so ruthless - so sure. So generous and so demanding.

Never do anything yourself that others can do for you.