PROOF THAT MARY WAS A SINNER, NEEDED A SAVIOR, HAD MORE THAN FOUR CHILDREN, AND IS NOT MEDIATRIX.
Proof of her being a sinner
Firstly, all men have sinned, including Mary, and fallen short of the glory of God [Rom 3:23], and through one man sin entered the world and death spread to all men [Rom 5:12]. King David writing in Psalms says that he was brought forth in iniquity and in sin when his mother conceived him - biblical proof of mankinds sinful nature from the time of conception. [Psa 51:5]. According to the law of Moses every mother that conceived, either a male or female, had to after an appointed time offer sacrifices to God: one as a burnt offering, and one as a sin offering [Lev.12]. Mary, after conceiving Jesus made these sacrifices in accordance and obedience to the Law God gave to Moses. This is clearly indicated to us in the book of Luke chap. 2 ver. 21-24, as Mary applies this very observance as is required of every Jewish woman who conceives her first born son. Read Leviticus 12 is first, understand what is being said, then read Luke 2:21-24. Once reading and understanding what is being said, it is clear that the offering Mary offers makes according to ... law of the Lord, A pair of turtledoves, or two young pigeons. [Lk.2:24], ... the one for the burnt offering, and the other for a sin offering: ... [Lev. 12:8]. The sin offering Mary gives is sufficient evidence Mary's carnality.
In need of a Saviour
Other proof of Mary being a sinner is found when Mary declares the need of a saviour. One is only in need of a saviour when realizing they are helpless and hopeless; that God in Christ having paid the penalty for the sins of mankind, is the One in Whom we are able to find redemption. [Col.1:12-14]. Mary also said, "My soul doth magnify the Lord, And my spirit hath rejoiced in God my Saviour" [Luke 1:46,47]. Again, Mary admits her estate as the handmaiden of God and not "Mother of God". Admiting her estate as a handmaiden because God used her instrumentally as a vessel to conceive the Lord Jesus Christ. By Mary s own words, she removes any idea of pre-emanance so as not to assume exaltation above God s calling upon her life. "For he hath regarded the low estate of his handmaiden: for, behold, from henceforth all generations shall call me blessed" [Luke 1:48].
Had more than four children
The Scriptures catergorically state the family Jesus had, and that Mary did conceive after the birth of Jesus. She never remained a virgin, and can never be considered "immaculate" as the Roman Catholic Church has exalteded her to be. "Is not this the carpenter's son? is not his mother called Mary? and his brethren, James, and Joses, and Simon, and Judas? And his sisters, are they not all with us? Whence then hath this man all these things?" (Mat 13:55,56).
Not Mediatrix
Mary as mediatrix is unfounded in Scripture. Scripture tells us who makes intercession for the saints before the Father.
There are two mediators in Scripture, who are:
Firstly, the Lord Jesus Christ.
By so much was Jesus made a surety of a better testament.
And they truly were many priests, because they were not suffered to
continue by reason of death: But this man, because he continueth ever,
hath an unchangeable priesthood. Wherefore he is able also to save them
to the uttermost that come unto God by him, seeing he ever liveth to make
intercession for them. [Heb 7:22-25].
Secondly, the Holy Spirit.
Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be uttered. And he that searcheth the hearts knoweth what is the mind of the Spirit, because he maketh intercession for the saints according to the will of God. [Rom 8:26,27].