1. People are kind and the world is unified. People are willing to do things that are beneficial to others. The world is for the common good and everyone is equal. As long as you are open-minded and kind to others, life will be beautiful wherever you go. This is a beautiful social ideal.

2. To be kind-hearted is to be willing to do things that are beneficial to others. It is the highest moral quality inherent in people and is an out-and-out positive energy. "People's hearts will be kind" comes from "Where etiquette exists, people's hearts will be kind; if etiquette does not exist, people's hearts will not be the same."

3. Example: That old lady has such a kind heart, she is kind-hearted, she knows how to be grateful, and she can remember the kindness others have done to her.