Faith and Reason in Medieval Philosophy: Key Insights

Posted on Dec 11, 2024 in Philosophy and ethics

Faith and Reason in Medieval Philosophy

Understanding the Relationship Between Faith and Reason

The question of the relationship between faith and reason is the most important topic of discussion throughout the Middle Ages. There are four basic positions in this regard:

  • The Augustinian tradition did not bother to mark boundaries between them. The Augustinians believed that faith and reason are intended to reveal truth.
  • From the thirteenth century, some claimed the autonomy of reason against faith.
  • In Latin Averroism, this requirement of independence for reason was stated in the theory of double truth.
  • Thomas Aquinas was at pains to formulate a doctrine that would guarantee both the autonomy of reason against faith and the harmony between them. This theory states that there are truths of both faith and reason, such as the existence of God and the immortality of the soul, among others.
  • The nominalism of the fourteenth century rejected common truths of reason and faith: for Ockham, reason and faith have different contents.

Arguments for the Existence of God in Medieval Philosophy

The positions most relevant to proving the existence of God in the Middle Ages are:

  • The Way of Internalization: Augustinianism showed a preference for the route of internalization, which captures within the soul eternal and immutable truths, whose basis can only be God, eternal and unchanging.
  • Anselm’s Ontological Argument: This is raised in his Proslogion:
    1. All men (even the fool) have an idea or notion of God; they understand God as a being such that it is impossible to think of another greater.
    2. A being must exist not only in our thoughts but also in reality.
    3. Therefore, God exists not only in thought but in reality.
  • Proofs from the World (A Posteriori): This argument reasons from the world to God, from the effect (the world) to the cause (God). Since there is always an effect after its cause, this type of reasoning has been termed a posteriori.

Greek Influences on Medieval Philosophy’s Cosmic and Moral Order

Medieval Christian philosophy assimilated Greek ideas; nature is a necessary order. This order required linking, in turn, to the supreme first. Since God is the creator and providential, Christian philosophers put on him the foundation of the order. The moral order is part of the general order of the universe.

Augustinian and Thomistic Contributions

This conception of order is shared by Augustinian and Thomistic philosophy. There are differences in nuance and terminology:

  1. Regarding nuance, Augustinianism lays the foundation of law, and hence of order, in the divine will, while Thomism puts it in the divine understanding.
  2. Regarding terminology, St. Augustine and St. Thomas speak of eternal law differently:
    • Aquinas uses this term to refer to the universal law governing the behavior of all beings. Natural law is, therefore, that part of eternal law which refers to man.
    • St. Augustine, by contrast, often uses the expression “eternal law” to refer to natural moral law.

Assimilation of Aristotelian Philosophy in the 13th Century

  • Return to St. Augustine: The Franciscans especially encouraged this Augustinian movement as a reaction to the danger of Arab Aristotelianism. St. Bonaventure, as a philosopher and theologian, stopped accepting certain Aristotelian doctrines.
  • The Adoption of Aristotle by Dominicans: The first adaptation of Aristotle was made by the Dominican Albertus Magnus, who also accepted many theories of Platonism. It was Thomas Aquinas who undertook this enormous task of assimilation, but not without suffering great difficulties.
  • The School of Oxford: This group of Franciscans did not criticize St. Augustine but began to see the interesting aspects of science, so they did not like Aristotle. Its main representative is Roger Bacon. All of them follow the Augustinian tradition but add something that belongs to the essence of Aristotelianism: the need for experience. Bacon affirmed the value of mathematics as a logical tool for all other sciences and conducted numerous investigations. He points to modern science.
  • Logic: Developed by the Majorcan Ramon Llull, this is a logic of scientific invention, a synthetic logic.
  • Latin Averroism

Five Key Topics in Medieval Philosophy

  1. The relationship between reason and faith and its role in understanding the world. This involves reconciling the thought of pagan philosophers with biblical and patristic tradition.
  2. God and his relationship to the world, demonstrating the existence of God, knowledge of his nature, and the significance of creation. This seeks to go beyond the God of philosophers and find the God of the Bible, also establishing the concept of creation and maintaining divine transcendence.
  3. The relationship between the natural order and the supernatural order. This brings many problems: grace and freedom, moral natural law, and the supernatural ultimate end of man.
  4. The problem of the relationship between church and state.
  5. Besides theological and philosophical disputes and the struggle between the Platonic-Augustinian tradition and Aristotelianism, many problems of a theoretical nature were raised.

Thomas Aquinas on Faith and Reason

Thomas Aquinas was primarily a theologian. He thought that theology is a science superior to others, a science that is the subject of divine knowledge. Theology also uses philosophical principles. To guide their use of these philosophical principles, Thomas Aquinas utilizes the relationship between faith and reason, so it is necessary and important to know how he interprets this relationship. Thomas Aquinas supports two kinds of truths: truths that surpass the capacity of human reason and those that can be achieved by natural reason. He worked hard to formulate a doctrine that would guarantee both the autonomy of reason against faith and the harmony between them. This theory states that there are truths of both faith and reason, such as the existence of God and the immortality of the soul, among others.

The confluence zone between reason and faith means that theology can use the principles of philosophy to better explain what it teaches, but the real philosophical principles of theology are articles of faith, not philosophy. Moreover, articles of faith are accepted without rational proof.

The Importance of Reason and Faith in Thomistic Philosophy

Aquinas says there is no double truth, but there are two kinds of truth: the truth of faith and the truth of reason. Both will have to supplement each other, but the truth of reason is more important to him because God has given it to man for a reason.

If the truth of reason is contrary to faith, it is false. Then there is only one truth. Reason has been created by God, and therefore his truth is superior, though we are never 100% certain.