where is the infallible doctrine defined in Scripture? through the saying, “your womb is blessed”? or she has been “full of Grace” is that it?
There are tons of ways Scripture shows us that Mary was concieved without sin.
But let me point out this: Mary’s sinlessness was NOT necessary. God could have chosen a sinful woman to bear His son.
But instead God gave this as a free gift.
Let me show you one of the ways we know Mary was with out sin:
Let’s start with the question: What does “emnity” mean? According to
dictionary.com it means ‘deep seeded hatred’ and ‘to be enemies’. According to one anti-Catholic source it means to be completely opposite and seperate from each other.
Are we, humans, completely seperate from sin and the devil? We’d like to say ‘yes’ but we have to remember that we still sin. So we cannot say we are completely seperate from satan.
What does Scripture say about Christ? Scripture says that Christ and Satan will have “enmity” between them. Does this make sense? Absolutely.
What does this have to do with Mary? In the same Scripture where it says that Christ and Satan will have “enmity” between them, it ALSO says that MARY and Satan will have “enmity” between them (Gen 3:15).
So, again, could Mary have had any sin but still have “enmity” between her and Satan?
Also we see in Revelations that Satan attempts to get at Mary (the woman) but Mary was taken “out of the serpant’s reach” (Rev 12:14).
Are we sinners “out of the serpant’s reach”? If we were honest, we’d have to say no.
On top of this, Scripture show that Mary is the New Eve, The New Ark of the Covenant as well as other things. See:
catholic.com/radio/shows/mary-the-new-eve-4624
catholic.com/magazine/articles/mary-the-ark-of-the-new-covenant
As the New Eve was created with out sin, could the New Eve be any different?
As R.C. Sproul put it, the Ark was so holy that no sinful man could touch it. Is the New Ark any different?
Just food for thought.
God Bless you in your journey of Faith,

Poor Knight for Christ and His Church