“A fool is known by three things. What three? They don’t recognize when they’ve made a mistake. When they do recognize it they don’t deal with it properly. And when someone else confesses a mistake to them, they don’t accept it properly. These are the three things by which a fool is known.

An astute person is known by three things. What three? They recognize when they’ve made a mistake. When they recognize it they deal with it properly. And when someone else confesses a mistake to them, they accept it properly. These are the three things by which an astute person is known. So you should train …”