All that the holy fathers say refers ultimately to Scripture as a foundation, which gives us the vivid image of the great Mother of God as being closely attached to her divine Son and always sharing his lot.
It is important to remember that from the second century onwards the holy fathers have been talking of the Virgin Mary as the new Eve for the new Adam: not equal to him, of course, but closely joined with him in the battle against the enemy, which ended in the triumph over sin and death that had been promised even in Paradise. The glorious resurrection of Christ is essential to this victory and its final prize, but the blessed Virgin’s share in that fight must also have ended in the glorification of her body. For as the Apostle says: When this mortal nature has put on immortality, then the scripture will be fulfilled that says “Death is swallowed up in victory”.
So then, the great Mother of God, so mysteriously united to Jesus Christ from all eternity by the same decree of predestination, immaculately conceived, an intact virgin throughout her divine motherhood, a noble associate of our Redeemer as he defeated sin and its consequences, received, as it were, the final crowning privilege of being preserved from the corruption of the grave and, following her Son in his victory over death, was brought, body and soul, to the highest glory of heaven, to shine as Queen at the right hand of that same Son, the immortal King of Age