"Since Our Lady’s whole life was a life of Her Heart, the Immaculate Heart represents Her life, Her love, Herself. From the moment of Conception, Mary offered acts of faith, hope, love, praise, adoration, and thanksgiving to the God Who created Her. Her one ambition was union with God, Her desire to do His will; the light of grace found no obstacle in Her pure soul. Her Immaculate Heart was the throne of all virtue. Devotion to the Immaculate Heart of Mary is the complement of devotion to the Sacred Heart; in the one we honor Christ, the Redeemer; in the other, Mary, co- redemptrix. Thus, we honor Christ’s Mother with the Feast of the Immaculate Heart of Mary.
God was so pleased with His Masterpiece of creation, Mary, that He willed to be born of Her pure flesh and blood. By giving Her consent, Mary became the channel through which Christ came to men; and this channel is the surest way to lead us back to God. It was Mary’s love for man, joined with and flowing from Her love of God, that made her utter Her 'Fiat' – that Fiat meant consent to the Incarnation and to the Redemption. So, also the Salvation of the world depends on Mary.
Among Our Lady’s urgent requests at Fatima was the plea for devotion and consecration to Her Immaculate Heart..."
--- From the "Feast of the Immaculate Heart of Mary, The Woman in Orbit Marian Calendar," roman-catholic-saints.com
--Parish Bulletin, Aug. 22, 2021