Thomas Aquinas was a very famous philosopher and theologian. He lived in the 1200s and is known for writing books about religion, philosophy and history. He thought a lot about the world and how God works in it. He believed that humans can only understand the world through reason and that God helps us understand it. He also believed that faith and reason should be used together to find truth. He wrote about many ideas, including what is right and wrong, what is good and bad, and how people should behave. All of his ideas have had a big impact on the way people think and act today.