Aquinas:St. Thomas Aquinas was a medieval philosopher and theologian whose work aimed to synthesize Aristotelian philosophy with Christian theology, greatly influencing Western thought.
Natural Theology:A branch of theology that seeks to understand God through reason and observation of the natural world, rather than through revelation or scripture.
Cosmological Argument: A type of argument for the existence of God that asserts everything that exists has a cause, leading to the conclusion that there must be an uncaused first cause, identified as God.