People who know the danger but don't say it are enemies. -Goethe

3, the gentleman is as light as water, the longer the more true. The population is as small as honey, and it is an enemy in an instant. -"Xun Zhi Zhai Ji"

4. High-quality gifts will ruin friendship. Because the giver may indeed forget his own summary, but the receiver will always feel this great kindness. -Wei Smith

5. It is better to make a friend who reads thousands of books than to make a friend who can't read. -"aphorisms are interlocking"

6. The same views and feelings can bring two people together more than contact. In this way, although far apart, it is also very close. tschaikovsky

7. The most important thing to deal with the fear of enemies outside is to make as many friends as possible; For those who cannot make friends, at least avoid making enemies with them; If you can't even do this, then you should try to avoid associating with them and alienate them for your own benefit. Epicurus