Then you also have to deal with the authority of Christ given to Peter the apostles and their successors mat 16:18 18:18
Bind on earth and is bound in heaven
Ineffabilis Deus
The Immaculate Conception
Pope BI. Pius IX - 1854
“We declare, pronounce, and define that the doctrine which holds that the most Blessed Virgin Mary, in the first instance of her conception, by a singular grace and privilege granted by Almighty God, in view of the merits of Jesus Christ, the Savior of the human race, was preserved free from all stain of original sin, is a doctrine revealed by God and therefore to be believed firmly and constantly by all the faithful.”
Gen 3:15 I will put enmities between thee and the woman, and thy seed and her seed: she shall crush thy head, and thou shalt lie in wait for her heel.
(Enmities total war, none of satan’s works found in Her immaculate purity)
Lk 1:28 And the angel came in unto her, and said, Hail, Mary full of Grace, the Lord is with thee: blessed art thou among women.
(Immaculate purity, full of grace, blessed)
Lk 1:35 And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.
(Mary must have immaculate purity)
Lk 1:47 And my spirit hath rejoiced in God my Saviour. (Preserved from all sin in virtue of the merits of the blood of the savior who is Her son)
Lk 1:49 For he that is mighty hath done to me great things; and holy is his name.
(Immaculate conception of Mary and the miraculous conception of Jesus)
Song of Solomon 4:1 Behold, thou art fair, my love; behold, thou art fair; thou hast doves' eyes within thy locks: thy hair is as a flock of goats, that appear from mount Gilead.
Rev 12:1 a woman clothed with the sun.
(Immaculate purity)