So I've been learning about Catholicism recently, I bought a catechism to deepen my understanding but the constant repetition I think is confusing me. Could you explain to me the Catholic doctrine of the Trinity? (nature, person procession... are things i'm interesting in learning about also) Thank You! :)
Hi, anon. That is a very complicated question, but I’m going to do my best to be fairly brief. But be aware that this is the GREATEST MYSTERY OF OUR FAITH. And it’s called a mystery on purpose: because it’s mysterious and we, as humans, can barely comprehend the immensity of God. Anything we can say about Him falls very, very short, but nevertheless I will do what I can.
Above is a commonly used illustration of the Trinity. As the caption says we believe in one God in three coequal and coeternal Persons who have one nature (divine).
God, though One, is also three. God is, in Himself, a family, a Trinity of Persons. Also, the Father is not 1/3 of God but rather fully God, as are the Son and Holy Spirit.
And, as I’m sure you know, the second Person of the Trinity, the Son, took on our human nature in Jesus Christ without losing His divine nature. In this way, Jesus Christ is one (divine) Person with two natures (human and divine). True God and true man.
I also want to point out that we use the names Father, Son and Holy Spirit (or, archaically, Holy Ghost) because those are the names that God has revealed to us. In fact, Catholics do not consider a baptism to be valid unless it was done “in the name of the Father, and of the Son, and of the Holy Spirit.” Some people say, “Creator, Redeemer, and Sanctifier,” and although those terms may be accurate, they are not the names that God has revealed to man. Also, they focus on what God has done for us (i.e. what we get out of it) rather than Who God is. God was Father, Son, and Holy Spirit before He ever created the world.