Being cheerful keeps you healthy. It is slow death to be gloomy all the time. But if you correct a wise man, he will respect you. People who listen when they are corrected will live, but those who will not admit that they are wrong are in danger. Stupid people always think they are right.
Wise people listen to advice.
A warning given by an experienced person to someone willing to listen is more valuable than gold rings or jewellery made of the finest gold. People learn from one another, just as iron sharpens iron. Even if you beat a fool until he's half dead, you still can't beat his foolishness out of him. One conclusion we can reasonably draw from this collection of proverbs is that the first thing we must learn is to learn. This may well be the root of other problems such as depression and anxiety.