The Mass gave full expression to the truths and mysteries of Christianity.

As with beauty and imagination, the order and symbolism of public prayer were bound up with truth. The Mass gave full expression to the truths and mysteries of Christianity. The Cross was there, but so was our Lord's crucified body, with the pierced side, the bloodied hands, the scourged and welted back, the thorns cutting into the forehead. His sacrifice was present. And so was the Virgin, who had given him flesh from her own flesh, nursed him from her bosom and accompanied him to the last. She was our link to the Incarnation — how could we leave her out of worship? ...

Without Mary, Christianity risked losing the truth about Christ's own identity — the union of two natures, divine and human, in one person — and drifting toward Gnosticism of various kinds.

Sohab Amari; From Fire, By Water