To be close to virtuous ministers and alienate from villains was the reason for the prosperity of the Early Han Dynasty; to be close to villains and alienate from virtuous ministers was the reason for the collapse of the Later Han Dynasty.
This comparison shows that when we study and make friends, we must master a selection criterion, that is, always be with people of good quality and good learning. This will naturally motivate you to study hard, and at the same time learn from its excellent qualities with an open mind, which can also improve your own personality. You must stay away from villains to avoid being influenced by them and forming unhealthy mental states and bad qualities.
The impact of the environment on people is still very important, and people are part of the environment. What kind of people around us are like will have a major impact on us to a large extent.