Confucius first founded a private school, advocating "teaching without discrimination". His education-related motto is: (1) See the sages in Siqi, but if you don't see the sages, you will be introspective; Learning from time to time is a pleasure; I go to three provinces every day and so on.
Socrates is the most famous educator in the west. Socrates, Aristotle and Plato left their names in the history of pedagogy.
Socrates' most famous sentence is "Know yourself", which has resonated with countless educators for thousands of years. Besides, ignorance is evil. If you put all the pains in the world together and let you choose, you may still be willing to choose your original one. People can make mistakes, but they cannot make the same mistakes and so on.