I think that's a fair conclusion. Perhaps even better is that he may be claiming that if one takes paragraph 2 seriously, one will eventually be able to see how he can say the later things he does.
Regardless one thing is certain: unless and until one does do what is described in paragraph 2, again with a heart desirous of the TRUTH, not with a desire to be "right", one will never really know what the outcome of reading the Saint's writings will be.
In other words unless one actually does do that as described above, one really can't speak with any authority on the authenticity and veracity of his writings there. It's just that simple.
I hear talk talk all the time from many about how the Holy Spirit is the teacher (which He is) of all things well here's an opportunity to put that into action. For anyone reading this: desire the truth over being "right" and He will indeed teach you. In ways you'll never expect.
There is nothing, I mean nothing in the NT, that ascribes to Mary the abilities, perogatives, etc that he, or other catholic writers have written.
The Bible does have this to say about her.
Mary was the mother of Jesus. She was a humble bondslave of our Lord. She knew her OT as evidenced by her prayer recorded in Luke. She was a "good" girl in that she had not engaged in extra marital sex prior to her marriage with Joseph. She and Joseph followed the Law as they offered the sin sacrifice after Jesus was born. She and Joseph raised Jesus. She saw her Son rejected and crucified by the leadership of the day. She also knew her Son was resurrected on the third day. She was in the Upper Room and was able to see the birth of the church that would be built around her Son.
She is blessed among women and she will always be remembered in that capacity.