Ad Caeli Reginam §35

³⁵ But the Blessed Virgin Mary should be called Queen, not only because of her Divine Motherhood, but also because God has willed her to have an exceptional role in the work of our eternal salvation. "What more joyful, what sweeter thought can we have" - as Our Predecessor of happy memory, Pius XI wrote - "than that Christ is our King not only by natural right, but also by an acquired right: that which He won by the redemption? Would that all men, now forgetful of how much we cost Our Savior, might recall to mind the words, 'You were redeemed, not with gold or silver which perishes, . . . but with the precious blood of Christ, as of a Lamb spotless and undefiled. We belong not to ourselves now, since Christ has bought us 'at a great price'.",