1. Just as true gold must be discerned in fire, friendship must be tested in adversity. ——Ovid

2. The best way to deal with the fear of external enemies is to make as many friends as possible; for those who cannot be friends, at least avoid making grudges with them; if even this is not possible If you can't do that, you should avoid interacting with them as much as possible and alienate them for your own benefit. ——Epicoo

3. First light and then thick, first sparse and then dense, first far and then close, this is the way to make friends. ——"Hu's Family Instructions"

4. You don't need to pay attention when talking to friends, but when facing enemies, you must always be on guard. ——Lu Xun

5. Sincere friendship seems to be healthy. Only when you lose it do you realize how valuable it is. —— Gordon

6. Never fall into pride. Because when you are proud, you will reject other people's advice and the help of friendship; because when you are proud, you will be stubborn when you should agree; because when you are proud, you will lose the objective criterion.

——Pavlov