A famous example of this is the letters Lord Chesterfield wrote giving good advice to his son. They are considered the outstanding examples of good advice. Unfortunately, the son paid absolutely no attention to what his father told him.

• 举一个有名的例子，切斯特菲尔德爵士在给他的孩子的信里，提出很多有用的劝告，但是他的孩子总是不以为然。