Nature repeats herself more than one would imagine. The sea has infinitely more variety.

Ladies tell their nurses things in a sudden burst of confidence, and then, afterwards, they feel uncomfortable about it and wish they hadn't! It's only human nature.

Well, people are like that too. THey create a false door - to deceive. If they are conscious of weakness, of inefficiency, they make an imposing door of self-assertion, of bluster, of overwhelming authority - and, after a time, they get to believe in it themselves. They think, and everybody thinks, that they are like that. But behind that door, Renisenb, is bare rock... And so when reality comes and touches them with the feather of truth - their true self reasserts itself.

But I don't doubt it will be essentially the same type of crime. The details may be different, but the essentials underlying them will be the same. It's odd, but a criminal gives himself away every time by that. Man is an unoriginal animal," said Hercule Poirot.
"Women," said Mrs. Oliver, " are capable of infinite variation. I should never commit the same type of murder twice running."
"Don't you ever write the same plot twice running?" asked Battle.

Evil is not something superhuman, it's something less than human.

The human comedy is always tragic, but since its ingredients are always the same—dupe, fox, straight, like burlesque skits—the repetition through the ages is comedy.