His closing years were passed at Bruges with his wife’s family; at Breda with the Duchess of Nassau, a Spanish lady who had formerly been his pupil; and at Paris, where he gave some courses of lectures. He had struggled against a weak constitution all his life, and after his return from England other diseases developed. He died on May 6, 1540, in his forty-eighth year, and was buried in the Church of St. Donat at Bruges. His most considerable contribution to the philosophy of education appeared after his return from England. It was entitled _De disciplinis_; was published in three parts, in 1531; and was dedicated to the King of Portugal. As Dr. Lange remarks, this work alone entitles Vives to large consideration as an educational reformer. Vives justifies, in the introduction, the position he assumes in regard to Aristotle; while he regards the Greek as a great philosopher, he declares that the world has gained in experience since Aristotle wrote, and he sees no reason why his teachings should not be set aside if found to be incorrect. He has no doubt but that later generations will find theories better adapted to their ends than those he himself advocates, but he greets as a friend the one who shall point out his errors. In the first part he treats of the decline of the sciences. The causes of this decline he considers twofold: (1) Moral; and here he notes an unwillingness to search for truth for truth’s sake. Pride is the root of this evil. A student in the University of Paris had remarked to him, “Sooner than not distinguish myself by founding some new doctrine, I would defend one of whose falsity I was convinced.” This moral weakness he thought altogether inconsistent with the advancement of the sciences. (2) Historical and material, including as causes the migration of nations by which existing orders of civilization have been annihilated; the obscurity of ancient manuscripts, requiring more time to decipher their meaning than it would take to discover from nature their meaning; the ever increasing use of commentaries in the study of originals, in which the diverse opinions of the commentators lead farther from the original sense; the practice of scholastic disputation which is taught the pupils before they know what they are disputing about; and the practice of regarding teaching as a trade rather than a profession, thus causing many bright minds to select other vocations, and to bring to the work incompetent and coarse minds.