Some years it’s difficult to transition from Easter to ordinary time. Our hearts get so used to celebrating, that it’s hard for them to slow down the pace and find excitement in normalcy. It’s nice, then, that the Church gives us some feast days after Pentecost, so we can ease our way back into ordinary liturgies with ordinary vestments and ordinary altar flowers.
We are blessed to celebrate one of those feast days today—Holy Trinity Sunday. St. John Paul II explained its significance during his Angelus for the solemnity in 2003:
This Sunday which follows Pentecost we celebrate the Solemnity of the Blessed Trinity. The Triune nature of God is the principal mystery of the Catholic faith. With it, we come to the end of the journey of revelation which Jesus fulfilled through his Incarnation, Passion, Death and Resurrection. From the summit of the "holy mountain" which is Christ, we contemplate the first and last horizon of the universe and of history: the Love of God, the Father and the Son and the Holy Spirit.
God is not solitude, but perfect communion. From God being communion derives the vocation of all humanity to form the one great family in which the various races and cultures meet one another and are reciprocally enriched (cf. Acts 17: 26).Today we celebrate this "perfect communion," this union of the Trinity which is ceaselessly praised in our liturgy and in our prayers. When we make the sign of the Cross, when we
repeat the Glory Be, and when we profess the Apostles’ Creed—we glorify the Trinity, the central mystery of the Catholic faith. As St. John Paul II once exclaimed:
This is our faith! This is the Church’s faith! This is the God of our faith: Father, Son and Holy Spirit!