What does it mean to be responsible for teaching the world right and wrong?

The most difficult thing to understand in this sentence is the meaning of "Feng Jiao". Feng Jiao is China's exposition on the social function of poetry in ancient times, which reflects the utilitarian requirements of the ruling class for literature and art in feudal society. This statement was first put forward in Preface to Shi Mao. First, the poems created by poets should play an enlightening role in social life; Second, the "upper class" of the ruling class educates the "lower class" through poetry. My understanding, the meaning of this sentence, the ancient "scholar" class should educate the people with the culture they have learned, and distinguish between right and wrong as its own responsibility, which is similar to establishing a heart for heaven and earth and establishing a way for the people.