Due to the need of church culture, the church attaches great importance to school education, because without the culture necessary for believers, especially priests, to publicize the Bible and perform religious duties, the church can not carry out its work, and gradually the church has mastered the power of national education.
The educational content of Christianity in the Middle Ages was mainly to publicize "divine right of monarchy" and "atonement". The divine right of monarchy preaches that the feudal king is the representative of God on earth and all ethnic groups should obey his rule. The atonement theory preached that God made Adam and Eve build the Garden of Eden, but they did not listen to God's will, ate the forbidden fruit and were driven out of the Garden of Eden. Therefore, human beings are born with original sin, and all the sufferings in the world are the retribution of their own crimes, so they have to atone for their sins from generation to generation, and "the body is the prison of the soul", and torturing the body can save the soul, so people must be abstinent, obedient and pious to save the soul and reach the "heaven" after death. These are all for the church to imprison people's thoughts and make people obey feudal rule.