St. Thomas was born nearly at the same time as St. Bonaventure, in the same wild valleys of the Apennines. They studied together at Paris; they lived and died and were canonized together.
It was said by Pallavicini that "when, in the twelfth century, the Arabs made Cordova a second Athens, and Averroes used the philosophy of Aristotle as a weapon against the faith, God raised up the intellect of St. Thomas, who, by deep study of Aristotle, found in his own principles a solution of the arguments used by infidels; and the scholastics, following him, have so employed Aristotle to defend Christianity, that whosoever rebels against the Vatican rebels also against the Lycaeum." St. Thomas had, however, to confute the errors of Aristotle, and of Abelard and others who had followed them, while he set forth the great truths of reason which he taught. It was in 1248 that he published a comment on the "Ethics." He had himself, says Ozanam, the learning and the weight of Aristotle; his power of analysis and classification, and the same sobriety of language. He had also studied the Timaeus of Plato, the doctrines of Albert, Alexander Hales, and John of Salisbury. He followed the school of St. Augustin, and drew from St. Gregory his rule of morals. His comments on the Sentences contain a methodical course of philosophy, as his Summa contains an abridgment of divinity. In an extract given by Ozanam, St. Thomas says, faith considers beings in relation to God; philosophy, as they [{695}] are in themselves. Philosophy studies second causes; faith, the first cause alone. In philosophy the notion of God is sought from the knowledge of creatures, so that the notion of God is second to that of his creatures; faith teaches first the notion of God, and reveals in him the universal order of which he is the centre, and so ends by the knowledge of creatures; and this is the most perfect method, because human understanding is thus assimilated to the divine; which contemplating itself contemplates all things in itself. Theology, therefore, only borrows from philosophy illustrations of the dogmas she offers to our faith.
It was in 1265 that, at the request of St. Raymond de Pennafort, St. Thomas wrote the Summa Theologies against the infidels in Spain; a book which has ever since been considered as a perfect body of theology and the manual of the saints. "In the philosophy of St. Bonaventure," says Ozanam, "the leading guide was perhaps rather the divine love than the researches of intellect." St. Thomas combined all the faculties under the rule of a lofty meditation and a solemn reason, uniting the abstract perceptions beheld by the understanding with the images of external things received by the senses. "It was a vast encyclopaedia of moral sciences, in which was said all that can be known of God, of man and his relations to God; in short, Summa totius theologies. This monument, harmonious though diverse, colossal in its dimensions, and magnificent in its plan, remained unfinished, like all the great political, literary, and architectural creations of the middle age, which seem only to be shown and not suffered to exist." And the Doctor Angelicus left the vast outline incomplete. That outline is to be appreciated only by the learned; the ignorant may guess its greatness by a catalogue, however meagre, of its contents. In the first part, or the natural, St. Thomas treats of the nature of God and of creatures; his essence, his attributes, and the mystery of the Holy Trinity; then, in relation to his creatures, as their Creator and Preserver. In the second, or moral, part he treats of general principles, of virtues and vices, of the movement of the reasonable creature toward God, of his chief end, and on the qualities of the actions by which he can attain it, of the theological and moral virtues. In the third, or theological, part he examines the means of attaining God, the incarnation and the sacraments. In the Summa, says Ozanam, "the notions of things lead to the attributes of the divinity, unity, goodness, and truth; thus, natural theology arrived at the unity as well as the attributes of God, while from his action is deduced his Personality and Trinity. Then follows the nature of good and bad angels, of souls in a separate state; and then the science of man considered as a compound being of soul and body, endowed with intellect for receiving impressions from the divine light above, and from its reflection on things below. He is also endowed with desire, by which he is formed to seek goodness and happiness, but is free in will to chose vice or virtue; and the rejection of sin, and acquisition of virtue, in a life regulated by divine human law, is a shadow of life in heaven. Enough has been said to show how lofty was the teaching of the saint; to whose invocation large indulgences are attached, and who had the task of composing the office used on the festival of Corpus Domini. The great object of his adoration and contemplation was the mystery of the real presence; and his Adoro Te devote may be used as an act of worship at the holiest moment of the sacrifice of the altar. The ecstasy of his joy in communion is expressed in the Gratias Tibi ago; and he declared his faith in the mystery as he lay on the ashes where he died. And this pure faith is recorded by Raphael, who represents him in his picture of the 'Dispute on the Blessed Eucharist' among the doctors of all ages before the miraculous host."
Like all other saints, he sought detachment by mortification, and the love of God by prayer. His principle was, that prayer must precede study, because more is learnt from the crucifix than from books; and his last maxim was, that in order to avoid being separated from God by sin, a man must walk as in the sight of God and prepared for judgment. When he laid aside his religious studies to prepare for eternity, he used the words of St. Augustin: "Then shall I truly live when I am full of thee and thy love; now am I a burden to myself, because I am not entirely full of thee."
Mystic theology was now carried to perfection by Gersen, abbot of the Benedictine monastery of Verceuil from 1220 to 1240. Many attribute to him the authorship of the "Imitation of Christ;" there are, however, a number of others who do not agree with this opinion. The "Imitation" is generally ranked as coming very close after the inspired writings. What is said of the interior life is more or less intelligible to those who are endeavoring after perfection, but must be unintelligible to any who have not the faith: "Una vox librorum" (iii. 43), says the author; but the one voice does not teach all alike, for he who is within is the teacher of truth. The four books are in the hands of all. The contents of the first are on the conduct of men as to the exterior world, and the qualities necessary for the following of Christ—humility, detachment, charity, and obedience; then grace will be found, not in external things, but within, in a mind calm, obedient, and seeking not to adapt but to master circumstances. The second teaches him who turns from creatures that the kingdom of God is within, and that the government of this inner world is the science of perfection: "Give room to Christ and refuse entrance to others; then will man be free amid the chaos, and creatures will be to him only the speculum vitae." Seek Christ in all, and you will find him in all; seek self, and you will find it everywhere: one thing is above all, that leaving all you leave self. In the third book the soul listens to the internal voice of God, who makes known to her that he is her salvation; and she therefore prays for the one gift of divine love. It is impossible, perhaps not desirable, to repeat the devout aspirations of this divine love. May those who read the holy words receive their import through the light of grace! The fourth book relates to the union of the soul with her Lord through sacramental communion; and this can only be read in the hours of devotion.
It is presumptuous to say even thus much of the great saints who lived in the thirteenth century, how is it possible to undervalue the progress they made in all the highest powers of the soul? or who can speak of the schools of the middle ages as deserving of contempt in days which cannot comprehend them?
Ozanam desires to show that Dante was trained in this exalted learning, and has embodied what he learnt in his Divina Commedia. He speaks of the full development attained by scholastic teaching in those great teachers, after whom no efforts were made to extend the limits of human knowledge; and he speaks of the perplexities which arose with the anti-papal schism. "It was to the calm and majestic philosophy of the thirteenth century," says Ozanam, "that Dante turned his eyes; and his great poem declared to an age, which understood him not, the contemplative, ascetic, and symbolical teaching of the mystic school, which he had studied in the Compendium of St. Bonaventure and the Summa of St. Thomas;" and he proves by an analysis of that wonderful poem that it contains not only the great truths of revelation, but the spirit of the decaying mediaeval philosophy:
"O voi che avete gli intelletti sani,
Mirate la dottrina che ascende
Sotto 'l velame del versi strani."