From chapter 27 of Laozi's Tao Te Ching.
original text
There is no trace of good deeds;
Good words are flawless;
Good numbers don't need planning;
Goodness has nothing to do with closure but cannot be opened;
Unsolved cordless contract.
Because saints are always good at saving people, they don't abandon people;
Always be good at preserving things, so there is no abandonment.
It means attacking Ming.
Therefore, a good person is a teacher who is not good at others;
People who are bad to others are the capital of good people.
I don't care about my teacher, I don't love my capital, although I am a big fan of wisdom.
It means beautiful.
translate
People who are good at walking will not leave traces; People who are good at talking will not have defects; People who are good at counting don't need bamboo codes; Good at closing, people can't open it without a bolt; Those who are good at binding can't untie without a rope. Therefore, saints often save people, so there is no abandonment; Often good at making the best use of things, so there are no discarded items. This is called hidden wisdom. Therefore, good people can be teachers of bad people, and bad people can be reference for good people. I don't respect my teacher, and I don't cherish his reference function. Although I think I am smart, I am really confused. This is the profound and subtle truth.
The twenty-seventh chapter of Tao Te Ching emphasizes that people, especially saints, should abide by the principle of "governing by doing nothing", which shows that people who have a way will naturally be kind to others, and even expresses that people who have a way will not abandon others and things. People don't abandon people, things don't abandon things, and good people and bad things in the world are all useful. Good is a teacher, and evil is a capital, so be kind to them. Especially for the bad guys, we should not despise him because of his incompetence. On the one hand, we should encourage and induce him, on the other hand, we should give him a role to learn as a good person. This takes into account two opposing aspects of things, not one. Careless and careless; Or only know one, don't know the other, will be complacent. It is not advisable to think that you are omniscient, omniscient and arrogant.