1. A good person is good because he is wise, and a bad person is bad because he is stupid.

From: [Ancient Greece] Plato: "Laris"

Introduction: Plato (Plato, Πλατ?ν, 427 BC - 347 BC), was an ancient Greek A great philosopher and one of the greatest philosophers and thinkers in all of Western culture.

2. Those who use friendship to benefit others will become distant from each other. How can we have true friendship? A proper friendship must be dedicated to the cultivation of morality.

From: [Ancient Greece] Plato: "Plato's Five Dialogues"

3. In misfortune, useful friends are more necessary; in luck, noble friends are more necessary. necessary. In misfortune, look for friends out of necessity; in luck, look for friends out of nobility.

From: [Ancient Greece] Aristotle: "Nicomachean Ethics"

Introduction: Aristotle (Aristotle 384 BC ~ 322 BC) , ancient sage, ancient Greek, one of the great philosophers, scientists and educators in the ancient history of the world, can be called the master of Greek philosophy. He was a student of Plato and teacher of Alexander.

4. You should only make friends with good people, not bad people. If you make friends with bad people, you will become bad. It is commonly said that those who are close to black will be black.

From: [Ancient Greece] Aristotle: "Nicomachean Ethics"

5. Don't have no friends, and don't have too many friends.

From: [Ancient Greece] Aristotle: "Nicomachean Ethics"