The phrase, “Cause of Our Joy,” refers specifically to the Blessed Virgin Mary, who, on account of her exalted status as the Theotokos, or the “Mother of God,” is the reason for our hope and joy, for it is she who was chosen to be the immaculate pathway by which the Eternal Word of God, the Second Person of the Most Holy Trinity, would enter into space and time, assume a true human nature, and forever graft that human nature to His divine nature, thereby beginning the work redemption. This salvific work was brought to completion of the altar of the cross, where Christ freely offered Himself, in our place, as the immaculate lamb of sacrifice, bearing our burdens, atoning for our transgressions against God, and bringing about the full reconciliation between God and humanity. The lance that was thrust into His Sacred Side by the Roman centurion, Longinus, resulted in a torrent of blood and water, which gushed forth from His Sacred Heart as a fount of Divine Mercy, thereby giving birth to the two most fundamental sacraments of the Church; namely, the cleansing waters of Baptism, and the Precious Blood of Christ of the New and eternal Covenant between God and Man. Thus, the Most Holy Eucharist, wherein we partake of the food and spiritual nourishment of Christ’s very body and blood, enables us to become by grace what Christ is by nature: divine. This, then, is the exalted vocation of every Christian; to participate in the Triune life of God through, with and in Christ, as members of His Mystical Body.