1. All the good things in the world have no other benefit to us except using them.

2. All things in the world are most valuable only if they are useful. If you accumulate a lot of anything, you should give it to others; the most we can enjoy is the part that can be used by us, and it is useless to have more.

3. A person who wants to educate others, the most important thing is to educate others. The effective way is to educate yourself first.

4. All things in the world are the most valuable only if they are useful.

5. If people are willing to compare their own situation with those of those environments If people who are worse off than them compare it with those who have a better environment, they will be sincerely grateful and will not complain about everything else. In human society, there are fewer complaints.

6. Sudden surprises are like sadness, which can be unbearable for a while.