Double standard. The same Church that defined the Trinity defines "Their Marian Dogma."
Since the same Church that defined the Trinity belives that Mary was taken to heaven body and soul. Is mistaken about this. Their is no guarantee that the Church that defined the Trinity is correct about the Trinity.
Let's take a look.
John 1
The Word Became Flesh 1In the beginning was the Word, and the Word was with God, and the Word was God. 2He was with God in the beginning. 3Through him all things were made; without him nothing was made that has been made. 4In him was life, and that life was the light of men. 5The light shines in the darkness, but the darkness has not understood[a] it.
6There came a man who was sent from God; his name was John. 7He came as a witness to testify concerning that light, so that through him all men might believe. 8He himself was not the light; he came only as a witness to the light. 9The true light that gives light to every man was coming into the world.
10He was in the world, and though the world was made through him, the world did not recognize him. 11He came to that which was his own, but his own did not receive him. 12Yet to all who received him, to those who believed in his name, he gave the right to become children of God
It says nothing of the relationship of the person of Jesus between His humanity and deity. It does not state at what point God became flesh. Since God became flesh. It looks like He is no longer God but something entirely new. Maybe a spirit that gives the illusion of flesh since God is spirit. It also says nothing about the Holy Spirit.
Colossians 1:15-22.
15He is the image of the invisible God, the firstborn over all creation. 16For by him all things were created: things in heaven and on earth, visible and invisible, whether thrones or powers or rulers or authorities; all things were created by him and for him. 17He is before all things, and in him all things hold together. 18And he is the head of the body, the church; he is the beginning and the firstborn from among the dead, so that in everything he might have the supremacy. 19For God was pleased to have all his fullness dwell in him, 20and through him to reconcile to himself all things, whether things on earth or things in heaven, by making peace through his blood, shed on the cross. 21Once you were alienated from God and were enemies in your minds because of[f] your evil behavior. 22But now he has reconciled you by Christ's physical body through death to present you holy in his sight, without blemish and free from accusation
It says that He was please to have all fullness dwell in Him. So Jesus is not God but seperate from God.
Romans 8:9
9You, however, are controlled not by the sinful nature but by the Spirit, if the Spirit of God lives in you. And if anyone does not have the Spirit of Christ, he does not belong to Christ.
Looks like two Spirits.
1st. There is the Spirit of God,
2nd. There is the Spirit of Christ.
Looks like one must have two Spirits.
And nothing about the relationship of the persons of the Trinity.
Nothing about the Trinity here.
Peace