'He sometimes listened to the sermons and discussions in the University, but he took care also to seek the truth himself in the Word of God and the traditions of the Church. When he was in the East he heard that a Saracen sultan had collected a great number of books for the use of the philosophers of his sect; he was ashamed to think that the Christians were less zealous to learn the truth than the infidels were to teach themselves lies. Therefore, on his return to France, he commanded that search should be made in the abbeys for all the genuine works of St. Augustine, St. Ambrose, St. Jerome, St. Gregory, and other orthodox teachers, and, having caused them all to be copied, he had them laid up in the treasure-house of the Sainte-Chapelle. He read them whenever he had any spare time, and gladly lent them to those who could make any use of them either for themselves or others. Sometimes towards the close of the afternoon he would send for persons of well-known piety, and converse with them of God, and also of the Bible stories and the lives of the saints or fathers of the Church.' {128} He had a special friendship for Robert of Sorbon the founder of the Sorbonne, and not only afforded him every facility and gave him all the necessary help for establishing his learned college, but also made him one of his chaplains, and often invited him to sit near him at dinner in order that he might have the pleasure of hearing him converse. 'One day it happened,' says Joinville, 'that Master Robert of Sorbon was sitting by my side at dinner-time, and we were talking together in a low voice. The King reproved us, saying, "Speak aloud, or your companions will think that you are speaking ill of them. If you are talking of anything at dinner-time that can give us pleasure, speak so that we can hear you; if not, be silent."'