Thomism is the ideas and philosophy of Thomas Aquinas, a famous philosopher who lived in the 1200s. He believed that there was a combination of faith and reason, which could be used to answer all questions and figure out the truth. He believed that God was at the center of things, and that we should strive to do good, and love what is holy. He also believed that the world was created by God, and that He was the ultimate source of knowledge. Basically, he wanted us to use our minds, hearts, and faith to make sense of the world.