[quote=DavidB]I find it fascinating that Marian dogma stems from the basis of her bearing Jesus and since we wouldn’t have Jesus without Mary, etc, etc. Yet that exact same logic and statements are true of Mary’s mother and father, yet we don’t claim that grace flows through them. Or from their parents or grandparents, etc, etc all the way back to King David. So why isn’t David the Mediator of all graces, it was his lineage that produced the Savior, without him, we wouldn’t have Jesus, right?
Mary is truly and forever blessed because she bore and raised Jesus with the help of Joseph. Yet that doesn’t make her any more a Mediatrix or CO-Redeemer than King David or any one of a number of people in an exact same position.
As you point out, all of Jesus’ ancestors shared in bringing the Messiah into existance and without any one of them Jesus would not have been born — the Jesse tree — but their participation was remote, passive, and uninformed when compared to Mary’s. Mary knew that, if she consented, she would give birth to the Messiah. None of Jesus’s other ancestors was given such an important choice. The fate of mankind’s salvation rested on Mary’s active, informed decision to become Jesus’s mother. St. Irenaeus wrote of Mary, about A.D. 189, saying:Mary, betrothed to a man but nevertheless still a virgin, being obedient, was made the cause of salvation for herself and for the whole human race. … Thus, the knot of Eve’s disobedience was loosed by the obedience of Mary. What the virgin Eve had bound in unbelief, the Virgin Mary loosed through faith. (Against Heresies, book 3, chap. 22)
It seems only fitting that God would reward such faithfulness in this life by making Mary the Mediatrix of all graces in the next.