After learning a little about loyalty, filial piety, benevolence, and righteousness, people think they can stand on the moral high ground and condemn everything they see. Some even indulge in delusions, thinking they can mete out punishment on Heaven's behalf and cleanse this wretched world.
But we are all mere mortals, made of flesh and blood. Even seeing the future is harder than reaching the heavens, and reading people's minds is pure guesswork. What gives us the right to compare ourselves to the gods?