SAINT THOMAS AQUINAS.  The patron of the Church of Saint Thomas Aquinas is known as The Angelic Doctor.  He is considered by many Catholics to be the Church's greatest theologian and the father of a school of philosophy that was the approach of the Catholic Church for many years. His unfinished work, Summa Theologiae, is his greatest piece of writing.  It covers his thoughts on the existence, simplicity, perfection, goodness, infinity, immutability, eternity, unity, life, will, love, justice, mercy, providence and power of God. 

To Aquinas, theology was a science with the raw material being the written scripture and the tradition of the church.  He believed that together, faith and reason process the scripture and tradition to obtain true knowledge of God.  The goal of theology is to understand the truth about God and to experience salvation through that truth. The goal of human existence is union and eternal fellowship with God.

St Thomas Aquinas felt that God is neither self-evident nor beyond proof.  In the Summa Theologiae, he laid out five proofs for God’s existence.  These are widely known as the "Five Ways."

• God is simple, without parts such as body and soul or matter and form
• God is perfect
• God is infinite
• God is incapable of change on the levels of His essence and character
• God is one, without diversification within God's self.