Who is the ancient educator who advocated "teaching without class"

In ancient times, Confucius was an educator who advocated "teaching without class".

[yüu Jia o wülèI]

There should be no social discrimination in teaching.

The idiom comes from The Analects of Confucius Wei Linggong: Confucius said, "There are no classes in teaching." Teaching: education; Class: Class. There are two explanations:

Explanation 1: Anyone can receive education.

Explanation 2: People are "superior" in nature. For example, some are smart and some are stupid; Some are virtuous and some are corrupt. However, these differences can be eliminated through education. "Teaching without class" means that "teaching without class" is the result of education, not the premise.

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