There are three types of people in the world. What three? One who is like carving on a rock, one who is like scratching on the ground, and one who is like writing on the water. What sort of person is like carving on a rock? Imagine a certain person who is always getting angry and his anger lasts long, just as carving on a rock is not soon worn off by wind, water or the passing of time. What sort of person is like scratching on the ground? Imagine a certain person who is always getting angry but his anger does not last long, just as scratching on the ground is soon worn off by the wind, water and the passing of time. And what sort of person is like writing on the water? Imagine a certain person who, even though spoken to harshly, sharply and roughly, is easily reconciled and becomes agreeable and friendly, just as writing on the water soon disappears.