The Franks did not trust the Byzantines – the split of the churches and peoples of Western and Eastern Europe had practically taken place. On the contrary, there was religious tolerance in the Islamic universities of Andalusia; most of the professors were Jews, and among the students there were many Catholics. Here one could study all Hellenic sciences and many Arab discoveries, especially in chemistry and medicine.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.