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Thomism

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Thomism is a famous school of thought. It comes from the work of Thomas Aquinas. He lived from 1225 to 1274. He was a Dominican philosopher and a theologian.

Santo Tomás de Aquino - Juan de Peñalosa (cropped)
Santo Tomás de Aquino - Juan de Peñalosa (cropped)

A theologian is someone who studies religious beliefs. Aquinas is often called a Doctor of the Church. His ideas are still very important to the Catholic Church today. Many people use his work as a main guide for faith and logic.

Benozzo Gozzoli - Triumph of St Thomas Aquinas - WGA10334
Benozzo Gozzoli - Triumph of St Thomas Aquinas - WGA10334

Thomas had a very special way of looking at truth. He believed truth should be accepted no matter where it is found. He studied ideas from Greek, Roman, Islamic, and Jewish thinkers. He also followed many ideas from a thinker named Aristotle.

Thomas Aquinas in Stained Glass crop
Thomas Aquinas in Stained Glass crop

Thomas was a realist. This means he believed we can know the world as it really is. He did not think the world was a mystery we could never solve. Instead, he used reason to understand life.

He wrote many deep books about these ideas. His most famous book is called the Summa Theologica.

SummaTheologiae
SummaTheologiae

In this book, he explains how things exist. He said every being has an essence. An essence is the "whatness" of a thing. It is what makes a thing what it is. He also talked about "accidents." These are qualities like color or shape. These qualities belong to a thing but are not the thing itself.

Thomas also studied why things happen. He used the idea of causes to explain the world. He believed there are four types of causes. These include the material cause and the formal cause. There is also the efficient cause and the final cause. The final cause is the purpose of a thing. He argued that an infinite chain of causes is impossible. Therefore, there must be a First Cause. He believed this First Cause is God.

To show how God exists, he gave five famous ways. These are known as the quinque viae. They include arguments about motion and causes. They also include arguments about how things have a purpose. Thomas believed God is the ultimate goodness. He said that even evil is just a lack of good. He taught that God is perfect and infinite. His work helps people connect their reason with their faith.

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File:Santo Tomás de Aquino - Juan de Peñalosa (cropped).jpg
Santo Tomás de Aquino - Juan de Peñalosa...
File:Thomas Aquinas in Stained Glass crop.jpg
Thomas Aquinas in Stained Glass crop.jpg
File:SummaTheologiae.jpg
SummaTheologiae.jpg
File:Benozzo Gozzoli - Triumph of St Thomas Aquinas - WGA10334.jpg
Benozzo Gozzoli - Triumph of St Thomas...
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