It was on his return from France in the year 1805, and in the ancient city of Cologne, that the subject of this memoir was received into the bosom of the Catholic church. There--in that venerable city, which was so often honoured by the abode of the great founder of Christendom--Charlemagne--which abounds with so many monuments of the arts, the learning, the opulence and political greatness of the middle age--where the great Christian Aristotle of the thirteenth century--Aquinas--had passed the first years of his academic course--there, in that venerable minster, too, one of the proudest monuments of Gothic architecture--was solemnized in the person of this illustrious man, the alliance between the ancient faith and modern science of Germany--an alliance that has been productive of such important consequences, and is yet pregnant with mightier results. The purity of the motives which directed Schlegel in this, the most important act of his life, few would be ignorant or shameless enough to impeach. His station--his character--his virtues--all suffice to repel the very suspicion of unworthy motives; and the least reflection will shew, that while in a country circumstanced like Germany, his change of religion could not procure for him greater honours and emoluments than under any circumstances, his genius would be certain to command; that change would too surely expose him to obloquy, misrepresentation, and calumny--and what to a heart so sensitive as his, must have been still more painful--the alienation, perhaps, of esteemed friends. Had he remained a Protestant, he would instead of engaging in the service of Austria, have in all probability taken to that of Prussia, and there doubtless have received the same honours and distinctions which have been so deservedly bestowed on his illustrious brother. We may suppose, also, that a man of his mind and character, would not on slight and frivolous grounds, have taken a step so important; nor in a matter so momentous, have come to a decision, without a full and anxious investigation. In fact, his theological learning was extensive--he was well-read in the ancient fathers--the schoolmen of the middle age, and the more eminent modern divines; and though I am not aware that he has devoted any special treatise to theology, yet the remarks scattered through his works, whether on Biblical exegesis, or dogmatic divinity, are so pregnant, original and profound, that we plainly see it was in his power to have given to the world a "_systema theologicum_," no less masterly than that of his great predecessor--Leibnitz. The works of the early Greek fathers, indeed, he appears to have made a special object of scientific research, well knowing what golden grains of philosophy may be picked up in that sacred stream. The conversion of Schlegel was hailed with enthusiasm by the Catholics of Germany. This event occurred indeed, at a moment equally opportune to himself and to the Catholic body.