From the 1945 Marian Missal:
Devotion to the Immaculate Heart of the Blessed Virgin Mary always flourished in the Church, but its first official approval did not come till the beginning of the 19th century when Pope Pius VI approved, for certain religious organizations, a Feast for the Most Pure Heart of Mary. The devotion was approved for the universal Church when Pope Pius XII dedicated all mankind to the Heart of Mary in December, 1942, following this by the institution of the new Feast of the Immaculate Heart of the B. V. M.
The Collect reads as follows:
Omnípotens sempiterne O Deus, qui in Corde beátæ Maríæ Vírginis dignum Spíritus Sancti Habitáculum præparásti: concéde propítius ut ejúsdem immaculáti Cordis festivitátem devóta mente recoléntes, secúndum cor tuum vivere valéamus.
Per omnia saecula saeculorum. R. Amen.
|Let us pray.
Almighty, everlasting God, who didst prepare in the Heart of the Virgin Mary a worthy dwelling-place for the Holy Ghost; mercifully grant that we, devoutly contemplating the festivity of the same Immaculate Heart, may be enabled to live according to Thy heart. Through our Lord Jesus Christ, Thy Son, Who liveth and reigneth with Thee in the unity of the Holy Ghost, God, Forever and ever. R.
That’s what’s left in the 1962 Missal. The 1945 Marian Missal is richer, continuing after the above with a prayer for the Octave of the Assumption, and another for the intercession of the saints. These read as follows (just English here, for brevity):
Let us pray. Forgive, we beseech Thee, O Lord, the sins of Thy servants, that we, who by our own deeds are unable to please Thee, may be saved by the intercession of the Mother of Thy Son, our Lord, Who with Thee liveth and reigneth in the unity of the Holy Ghost, God,
Forever and ever.
Let us pray. Defend us, we beseech Thee, O Lord, from all dangers of mind and body: and through the intercession of the blessed and glorious Mary, ever Virgin, mother of God, of St Joseph, of Thy holy apostles, Peter and Paul, and of all the saints, in Thy loving-kindness grant us safety and peace; that, all adversities and errors being overcome, Thy Church may serve Thee in security and freedom. Through our Lord Jesus Christ, Thy Son, Who liveth and reigneth with Thee in the unity of the Holy Ghost, God,
Forever and ever.