2. All the truths in the world can't be compared with one sentence.
You can be a kind person, but you don't have to be kind to unnecessary people. Remember one sentence: it is a well-known truth that people change their minds.
4. Don't spoil others' sincerity casually. The worse luck now, the better another time. Who do you think God spared?
If you are too lazy to explain, it is meaningless to be a good person. You should at least live a clean life.
6. Listen to whatever you like, wear whatever you like, and pester whoever you like, regardless of those broken theories.