I. =The Dialectic Side of the Gulf.=--=Peter Abælard=, superior to all his contemporaries in acuteness, learning, dialectic power, and bold freethinking, but proud and disputatious, was born at Palais in Brittany in A.D. 1079. His first teacher in philosophy was Roscelin. Afterwards he entered the school of William of Champeaux at Paris, the most celebrated dialectician of his times. Having defeated his master in a public disputation, he founded a school at Melun near Paris, where thousands of pupils flocked to him. In order to be nearer Paris, he moved his school to Corbeil; then to the very walls of Paris on Mount St. Genoveva; and ceased not to overwhelm William with humiliations, until his old teacher retreated from the field. In order to secure still more brilliant success, he began to study theology under the Schoolman Anselm of Laon. But very soon the ambitious scholar thought himself superior also to this master. Relying upon his dialectical endowments, he took a bet without further preparation to expound the difficult prophet Ezekiel. He did it indeed to the satisfaction of scholars, but Anselm refused to allow him to continue his lectures. Abælard now returned to Paris, where he gathered around him a great number of enthusiastic pupils. Canon Fulbert appointed him teacher of his beautiful and talented niece Heloise. He won her love, and they were secretly married. She then denied the marriage in order that he might not be debarred from the highest offices of the church. Persisting in this denial, her relatives dealt severely with her, and Abælard had her placed in the nunnery of Argenteuil. Fulbert in his fury had Abælard seized during the night and emasculated, so that he might be disqualified for ecclesiastical preferment. Overwhelmed with shame, he fled to the monastery of St. Denys, and there in A.D. 1119 took the monastic vow. Heloise took the veil at Argenteuil. But even at St. Denys Abælard was obliged by the eager entreaties of former scholars to resume his lectures. His free and easy treatment of the church doctrine and his haughty spirit aroused many enemies against him, who at the Synod of Soissons in A.D. 1121 compelled him before the papal legate to cast into the fire his treatise _De Unitate et Trinitate divina_, and had him committed to a monastic prison. By the intercession of some friends he was soon again set free, and returned to St. Denys. But when he made the discovery that Dionysius at Paris was not the Areopagite the persecution of the monks drove him into a forest near Troyes. There too his scholars followed him and made him resume his lectures. His colony grew up under