For you did not receive a spirit of slavery to fall back into fear, but you have received a spirit of adoption to sonship. (Rom. 8:15). ⧾
Each year, on the Sunday following the Solemnity of Pentecost we celebrate the Mystery of the Most Blessed Trinity, the central mystery of Christian faith and life. It is the Mystery of God Himself (The Catechism of the Catholic Church, #234). The Mystery of the Most Holy Trinity is an absolute mystery. It is a mystery of faith in the strict sense, one of the mysteries that are hidden in God, which can never be known unless they are revealed by God (The Catechism of the Catholic Church, #237). As the central Mystery of the Christian faith, this mystery reveals that the God whom we worship is neither absent from His people nor fully identifiable with them. The life of Our Lord on earth is a gradual revelation of this Mystery, culminating with the revelation of the Holy Spirit as a Divine Person on Pentecost. The logic of the sacred liturgy rightly places today’s Feast on the Sunday after Pentecost.
The collect of our Mass expresses a living truth: that in professing the true faith, we may acknowledge the Trinity of eternal glory and adore [God’s] Unity, powerful in majesty (Collect, Feast of the Most Holy Trinity, The Roman Missal). This Mystery that God has revealed to us is more than a dogmatic, religious truth. The Mystery of the Most Blessed Trinity is the central mystery of Christian faith and life. We do not worship an abstract thought or theory, a force or ‘Supreme Being’, but a Trinity of Persons who dwells in us through grace. The complexity of this Mystery, at face value, speaks to its truth. St. Thomas Aquinas observed that the truth of the Christian faith exceeds not only human minds but also those of angels; we believe in them only because they are revealed by God (De Rationibus Fidei).