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

More from Agatha Christie

• I continued to do arithmetic with my father, passing proudly through fractions to decimals. I eventually arrived at the point where so many cows ate so much grass, and tanks filled with water in so many hours I found it quite enthralling.
• I continued to do arithmetic with my father, passing proudly through fractions to decimals. I eventually arrived at the point where so many cowsate so much grass, and tanks filled with water in so many hours I found it quite enthralling. An Autobiography
• I like living. I have sometimes been wildly, despairingly, acutely miserable, racked with sorrow, but through it all I still know quite certainly that just to be alive is a grand thing.