Holy Ghost and Mary Enable Us to Know Christ
We are led to this conclusion, namely that the Holy Ghost acts through Mary, by the texts of Sacred Scripture and the words of the saints, who are the best interpreters of Sacred Scripture: "And I will ask the Father, and he will give you another Paraclete, so that he might abide with you for eternity, the Ghost of truth ... (Jn 14:16-17). The Paraclete, the Holy Ghost, however, which the Father will send in my name, he is the one who will teach you all things and bring to your minds all that I have said to you...(Jn 14:26); however when the Ghost of truth shall have come, he will teach you all the truth...He will glorify me..." (Jn 6:13-14).
Bl. Louis Grignion uses words of almost the same meaning in regard to the Immaculata:
We have not yet known Mary, and for this reason we also do not know Christ as we should. If however Christ is to become known and his kingdom is to come upon the earth-which has to come to pass regardless this will result solely from Mary's being known, and from her reign over us; for Mary gave birth to Jesus for the salvation of the world in the first place, and now renders us fit to know him clearly.
Therefore, just as the Second Person of God appears in the flesh bearing the name "seed of the woman," so also the Holy Ghost reveals his share in the work of redemption through the Immaculate Virgin whom he has conjoined with himself most profoundly in a manner surpassing all our power to understand, but preserving into the Personhood of each of them. Their union, therefore, is different from the hypostatic union that unites the two natures, divine and human, in the one sole Person of Christ; nevertheless, this difference in no way prevents the action of Mary from being the most perfect action of the Holy Ghost. For Mary, as the Spouse of the Holy Ghost and who is, therefore, raised above all created perfection, fulfills in every way the will of the Holy Ghost who dwells in her and with her and this from the first instant of her conception.