My dear friend, thank you for asking what the Word of God says about this. I’ll give you the quick answer first, then I’ll follow up with specific passages from God’s Word, the Bible, which I hope will shed some Scriptural light on this question for you.

The quick answer is: No, Mary was fully human, and therefore, like all of us, she was a sinner. The Lord Jesus was in fact sinless, and this is because He was both true God and true man; He was God, come to dwell among us in the form of a Man. He is the only Man on earth who was ever “perfect,” and that’s because He was and is the unique, only begotten Son of God. Today, as our risen and glorified Lord, He is in the glory, and true God and true Man still. 

The mystery of the Godhead, the Trinity, is not easy for humans to understand, but is quite true none-the-less. God is “the self-existent” One, and He is one God, and the only God: Having said that, though, we see Him in Scripture as God the Father, God the Son, and God the Holy Spirit. We have One true God, but He is manifested in three distinct persons, each having no beginning and no end. Already in Genesis 1:26, we see the first Bible evidence of this truth in the use of the plural personal pronoun refering to God: “And God said, Let US make man in OUR image, after OUR likeness….” Moving on to some New Testament references, we see that the One whom we know as the Lord Jesus is in actuality God the Son, who was ever with the Father, and who was involved in creation as well as the maintaining of that creation (see Colossians 1:15-19; John 1:1-4,14; Hebrews 1:2-3,8,10-12; Philippians 2:5-11; Matthew 1:22-23). I believe that the verses I have cited very well establish that Jesus Christ is God, God the Son, who when He came to earth was called “Jesus”, and was referenced as Emmanuel, or “God with us”. God the Son came to earth, veiling His deity in human flesh, and was born of the Holy Ghost by a woman, Mary. Mary was pure human, but Jesus, being the only begotten of the Father, was true God, having God the Father as His Father, and was true Man, having Mary for His mother. Again, this was “Emmanuel,” or God with us. And, indeed, He was sinless.” In 2 Corinthians 5:21 we read: “For He hath made Him to be sin (a sin offering) for us, who knew no sin…;” and then again in 1 John 3:5 we read: “…and in Him is no sin.“  Another such reference would be Hebrews 4:15: “…but was in all points tempted like as we are, yet without sin.”

Now, Mary, as I have said, was not a deity at all. She was fully human born, and fully human. As fully human, Mary was a sinner by nature and by choice, just like all others of mankind, and thus, like all of us, she needed the Savior (Romans 3:10-23; 6:23; Acts 4:12).  There is no place in the New Testament where Mary is designated as sinless.  In fact we read of Mary’s position as needing a savior in Luke 1:46-47, “And Mary said, My soul doth magnify the Lord, And my spirit hath rejoiced in GOD MY SAVIOUR.”  Neither is there any place where she is identified as a mediator between us and the Lord Jesus (1 Timothy 2:5).

Now, we do read of all kinds of miracles demonstrated by the Lord Jesus to show Him as the true Messiah, but there are no miracles cited in the Bible by Mary herself. At the marriage feast of Cana, we see only the Lord Jesus turning the water into wine, and Mary’s part was to tell the servants “…Whatsoever He saith unto you, do it.” Finally, the last reference in Scripture of Mary shows her to be one of the disciples of Christ, and never their leader (Acts 1:14). In all the NT Scriptures, Mary is never mentioned after this verse in Acts, and she is never cited as the one to pray to, but this is reserved to only Jesus Christ, the Man in the glory (Hebrews 4:15,16). Thus, I say, Mary, while highly favored of God (Luke 1:28), was only human, and as such a sinner in need of a Savior, just like you and me. There are no Biblical references indicating that Mary was “sinless,” but plenty of Biblical proofs that the Lord Jesus was, being the Son of God.  (SF)  (559.2)