I’m leaving Catholicism, and Christianity more broadly, because I cannot reconcile the God of Classical Theism, who is absolutely simple, with a Trinity.
To say that the Father, the Son, and the Holy Spirit have the same Divine Essence implies that they are themselves the same, which contradicts Church teaching.
To say that they differ as persons but not in essence doesn’t make sense given Divine Simplicity (because God’s Personhood must be synonymous with his Existence and all of his other attributes).
To say that his personhood differs from his Divine Essence is to deny simplicity and to turn God into a composite being, thus requiring that something be metaphysically prior to him, which would deny that he’s the First Cause.
To appeal to God being a “mystery” is only to beg the question. I do not doubt for a second that God (Pure Actuality, Ipsum Esse) is a mystery in the sense that we will never be able to truly grasp
his essence, but this doesn’t apply to concepts that are logically contradictory.
Don’t get me wrong. I still respect the Catholic Church, and I’m open to listening to your guys’ objections and I’m more than willing to engage, I just cannot be Catholic if it means accepting logically contradictory doctrines.