Born to be human, there must be kindness. What was his state of mind when he said this sentence?

As an individual, you must be kind to be a man. A person who is unkind and unsympathetic can do all kinds of bad things. He is really not a person. Kindness and compassion are the bottom line of morality. According to Mencius, it is the beginning of the difference between man and beast. There is only a little difference between man and beast. We should carry it forward. If it disappears, people will become "inhuman" and people will become animals from numbness and death of compassion.