"Why swear words hurt people" is also a very important force. Although the speaker may be unintentional at that time, or he may have to say it for some reason, it will harm others and himself.
"Heaven has eyes to see" means that God still sees things clearly in the world. Although it seems that people sometimes seem unfair, God will uphold this justice.
If there is injustice in "suppressing Ming and co-expanding", it will be rehabilitated. It means that if you suffer, you will get something back.