Alright kiddo, so Thomas Aquinas was a very smart man who lived a long time ago. He spent a lot of time thinking about things like God and how we know things.
One big idea he had was that we can use our reason and logic to understand things about the world and God. He believed that God created the world and gave us the ability to use our minds to figure out how it works.
Another thing he talked about a lot was how things are connected. He believed that God made everything to work together, like how our bodies have different parts that work together to help us move and live.
Overall, Thomas Aquinas was a really important thinker who tried to use his ideas to help people understand the world and God better.