Wisest guru in the land
A man travels many miles to consult the wisest guru in the land. When he arrives, he asks the wise man: “Oh, wise guru, what is the secret of a happy life?”
“Good judgement,” said the guru
“But oh, wise guru,” says the man, “how do I achieve good judgement?”
“Bad judgment,” says the guru.
From – Chapter 8 – Mistakes were made (not by me)