(Compilation by Father Jorge Hidalgo)
You can read the original text (in Portuguese) here.
Pope Pius IX
“Just as Christ, the mediator between God and men, having assumed human nature, blotted out the handwriting of the decree that stood against us and triumphantly affixed it to the Cross, so too the Most Holy Virgin, united to Him by a most intimate and indissoluble bond, waging with Him and through Him her eternal enmities against the venomous serpent and triumphing fully over it, crushed its head with her immaculate foot.” (Bull Ineffabilis Deus, 8 December 1854)
Pope Leo XIII
“The Virgin, free from the stain of original sin, chosen to be the Mother of God and thus associated with the work of the salvation of the human race, enjoys with her Son a favour and a power so great that neither men nor angels have ever attained, nor ever shall attain, anything comparable.” (Supremi Apostolatus, 1 September 1883)
“She who had been the co-operatrix in the mystery of man’s redemption would also be the co-operatrix in the dispensation of the graces that flow from it.” (AAS 28 [1895–1896], 130–131)
Pope Saint Pius X
“The consequence of this communion of sentiments and sufferings between Mary and Jesus is that Mary deserved to be the most worthy reparatrix of the lost world and, therefore, the dispenser of all the treasures that Jesus won for us by His death and by His blood.” (Ad diem illud, 2 February 1904)
Pope Benedict XV
“The Doctors of the Church generally teach that the Most Holy Virgin Mary, who seemed to be absent from the public life of Jesus Christ, was nevertheless at His side when He went to His death and was nailed to the Cross, being there by divine disposition. Indeed, in communion with her suffering and dying Son, she endured sorrow and almost death; she renounced her maternal rights over her Son to obtain the salvation of men; and, to appease divine justice insofar as it was fitting for her, she immolated her Son, in such a way that it can rightly be said that she redeemed the human race with Christ. And therefore every kind of grace we receive from the treasury of redemption comes to us, as it were, from the hands of the sorrowful Virgin.” (Epist. Inter sodalicia, 22 May 1918)
Pope Pius XI
“O Mother of pity and mercy, who accompanied your sweet Son while He accomplished upon the altar of the Cross the redemption of the human race, as our Co-Redemptrix, associated with His sufferings… preserve within us and increase each day, we beseech you, the precious fruits of the redemption and of your compassion.” (Radio Message, 28 April 1935)
Pope Pius XII
“Since God willed that, in the accomplishment of human redemption, the Most Holy Virgin Mary should be inseparably united to Christ, in such a way that our salvation is the fruit of the charity of Jesus Christ and of His sufferings intimately joined to the love and sorrows of His Mother, it is perfectly reasonable that the Christian people, who have received divine life from Jesus through Mary, after offering due homage to the Most Sacred Heart of Jesus, should also manifest to the most loving Heart of the heavenly Mother corresponding sentiments of piety, love, thanksgiving, and reparation.” (Haurietis Aquas, 15 May 1956)
Second Vatican Council
“Conceiving Christ, giving Him birth, nourishing Him, presenting Him to the Father in the temple, suffering with her Son as He died upon the cross, she cooperated in a wholly singular way in the work of the Saviour, by obedience, faith, hope and burning charity, to restore supernatural life to souls. For this reason, she is our Mother in the order of grace.” (Lumen Gentium, no. 61.)
