Scholasticism and Thomas Aquinas

Historical Theology

Historical Setting

By the twelfth and thirteenth centuries, the intellectual life of Europe had moved from the quiet of the monastery into a new and bustling institution: the university. Paris, Oxford, Bologna, and others gathered masters and students into communities devoted to disciplined inquiry. The method that flourished there came to be called scholasticism — “the way of the schools.” It proceeded by posing a question, marshaling the authorities on every side, raising objections, and then resolving the matter with careful distinctions. Peter Lombard’s Sentences became the standard textbook upon which every aspiring theologian lectured.

Into this world came a flood of recovered learning. The writings of Aristotle, long lost to the Latin West and preserved by Muslim and Jewish scholars in the Arab world, were translated into Latin and arrived like a tidal wave. Aristotle offered a complete and powerful philosophy of nature, logic, ethics, and metaphysics — but a pagan one, knowing nothing of Christ. The great question of the age became: what is the church to do with this brilliant pagan? Reject him? Baptize him? The man who gave the most enduring answer was a quiet, immense Dominican friar named Thomas Aquinas (1225–1274).

What Was at Stake

The stakes were the relation of faith and reason, and of nature and grace. Could the truths discovered by unaided human reason — Aristotle’s logic, his physics, his ethics — be reconciled with the truths revealed in Scripture? Was philosophy the enemy of faith, a neutral servant, or something in between? If the church got this wrong in one direction, it might wall itself off from all natural knowledge and despise the mind; if it erred in the other, it might let pagan philosophy set the terms for Christian theology. The whole shape of Christian thought for centuries hung on the answer. Behind it lay a still deeper question: how much can fallen man know of God by nature, and how badly has sin damaged his reason?

Key Players

Thomas Aquinas, the “Angelic Doctor,” whose Summa Theologiae is among the most influential books ever written. His teacher Albert the Great first championed the study of Aristotle. Bonaventure, the great Franciscan, represented a more Augustinian and mystical alternative, wary of leaning too hard on the pagan philosopher. The Arab commentator Averroes and his Latin followers represented the danger Thomas sought to avoid — a reading of Aristotle that threatened key Christian doctrines. And over all stood Aristotle himself, whom Thomas reverently called simply “the Philosopher.”

The Outcome

Aquinas achieved a vast synthesis. He held that grace does not destroy nature but perfects it — that reason and revelation, rightly understood, cannot finally contradict each other, because both come from the one God of truth. Reason can reach genuine truths about God: His existence, His unity, certain of His attributes. These Thomas laid out in the famous Five Ways (quinque viae), arguments from motion, from causation, from contingency, from degrees of perfection, and from the order of nature, each concluding to a first mover, first cause, necessary being, greatest being, and intelligent designer — “and this everyone understands to be God.” Yet reason has limits. The deepest mysteries — the Trinity, the incarnation, the way of salvation — cannot be reached by reason at all but must be received by faith from divine revelation. So nature and grace form two stories of one building: reason builds the lower floor, grace the upper, and the two are continuous.

The Summa Theologiae, structured as a series of questions and answers, treats God, creation, man, the moral life, the virtues, Christ, and the sacraments with a comprehensiveness and clarity unmatched in the Middle Ages. Aquinas was not honored in his own day by all; some of his propositions were condemned at Paris in 1277, three years after his death. But within a century he was canonized, and Thomism became the dominant theology of the Roman church, later declared its official philosophy.

Scriptural Grounding

Aquinas was right that the creation truly reveals its Creator, and Scripture says so:

“For his invisible attributes, namely, his eternal power and divine nature, have been clearly perceived, ever since the creation of the world, in the things that have been made. So they are without excuse.” (Rom. 1:20, ESV)

“The heavens declare the glory of God, and the sky above proclaims his handiwork.” (Ps. 19:1, ESV)

Yet the same Scripture insists that fallen reason, apart from grace, suppresses this knowledge and turns it to idolatry (Rom. 1:21–23), and that the natural man cannot receive the things of the Spirit:

“The natural person does not accept the things of the Spirit of God, for they are folly to him, and he is not able to understand them because they are spiritually discerned.” (1 Cor. 2:14, ESV)

Doctrinal Significance

Aquinas bears on the doctrine of God (the divine attributes, classically and rigorously stated), on revelation (natural and special), and on the knowledge of God by fallen man. The Reformed tradition stands largely with Thomas on the classical doctrine of God — His simplicity, eternity, immutability, and aseity — and has often defended that inheritance against modern revisions. Reformed theologians have made fruitful use of Thomas on the divine nature and on much else.

The deeper Reformed reservation concerns the nature/grace synthesis and its estimate of fallen reason. Thomas tended to see sin as wounding human nature and weakening the will, with grace added on top to elevate nature to its supernatural end. The Reformers, reading Augustine and Paul more darkly, saw sin as corrupting the whole man — including the reason and the will — so that natural theology, while real, is universally suppressed and twisted by sinners (Rom. 1:18). Grace, therefore, is not merely an elevation of nature but a renewal and redemption of a fallen nature; the Spirit must illumine, regenerate, and grant faith before the truths of God are savingly received.

A Reformed Assessment — Wheat and Chaff

Charity and honesty both require us to begin with Thomas’s genius. He taught vast tracts of genuine truth: the existence and attributes of the one God, the goodness of creation, the reality of God’s self-revelation in nature, the harmony of all truth in God, the necessity of grace and of revealed mysteries beyond reason’s reach. He was a man of deep prayer who reportedly broke off the Summa near the end, saying that all he had written seemed as straw compared to what he had seen of God. The caricature of Thomas as a dry rationalist is false; he was a worshipping theologian.

The chaff lies partly in the synthesis itself and far more in its later misuse. Thomas’s relatively optimistic view of fallen reason and of human cooperation with grace was hardened by some later “Thomists” into a system of merit in which grace becomes a substance infused to enable man to earn (in a qualified sense) his final justification — the very framework the Reformation would confront (see 03_04, 04_01). At the Council of Trent, a Thomistic vocabulary was marshaled against the Reformation gospel. The lesson is not that Thomas was the enemy of the gospel — Reformed thinkers from Calvin to the present have learned much from him — but that even the greatest synthesis must be tested by Scripture, and that a system can be turned to ends its author might not have owned.

Connections

This topic touches the loci of Theology Proper (the doctrine of God), Revelation, and Anthropology (the noetic effects of sin), and connects to WCF 1 (Of the Holy Scripture, on natural and special revelation) and WCF 21 indirectly on the knowledge of God. It builds on Anselm’s faith-seeking-understanding (03_02) and the doctrine of God from era 02. It looks forward to the medieval sacramental and merit system (03_04) and to the Reformation’s recovery of grace alone (04_01).

Lessons for Today

Aquinas teaches us that the life of the mind can be an act of worship and that Christians need not fear truth wherever it is found, for all truth is God’s. He also warns us that reason is not autonomous: a theology that quietly lets philosophy set its terms, or that overestimates what fallen man can know of God apart from the Spirit, will drift. The Reformed path is neither to despise reason nor to enthrone it, but to make it the servant of the Word — sola Scriptura governing, reason ministering.