At the beginning of life, human nature is good; The same nature varies from upbringing to upbringing.
Do not teach, be sexually active; In order to teach well, you should think deeply.
Interpretation: At the beginning of birth, people are all kind in nature and similar in essence. Just because of the different environment and education, their habits are very different.
If you haven't received a good education since childhood, your kind nature will degenerate. In order to keep people from becoming bad, the most important way is to educate children wholeheartedly.
The explanation of teaching is the method of education.