The young people think the old people are fools -- but the old people know the young people are fools.

A mother's love for her child is like nothing else in the world. It knows no law, no pity, it dares all things and crushes down remorselessly all that stands in its path.

Real evidence is usually vague and unsatisfactory. It has to be examined---sifted. But here the whole thing is cut and dried. No, my friend, this evidence has been very cleverly manufactured---so cleverly that it has defeated its own ends.

The best time to plan a book is while you're doing the dishes.

One must make one's own mistakes

If you are to be Hercule Poirot, you must think of everything.

People who can be very good can be very bad too.