In honor of Trinity Sunday we study the doctrine of the Holy Trinity, understand why we celebrate Trinity Sunday immediately after Pentecost, and why the heresies against the Trinity are in grave error.
All CatechismClass Lessons follow our time-tested 7 Step format: Introduction, Opening Prayers, Scripture and Commentary, Catechism Passages, Integration of the Lesson Topic, an activity, and a closing prayer. Quizzes end each of the lessons.Preview This Lesson
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INTROIT Tobit 12:6 Blessed be the Holy Trinity and undivided Unity. We will give glory to Him, because He has shown mercy to us. Ps. 8:2. O Lord, our Lord, how glorious is Your name over all the earth! V. Glory be …
Today is the Solemnity of the Most Holy Trinity, where we recall the most fundamental mystery of the Christian faith—that God is a Truine God. There is but One Almighty God as Our Lord declared to Moses on Mount Sinai. Yet, in the New Testament we realize the true nature of Our God—He is three persons. For God the Father, God the Son, and God the Holy Spirit are but the same God merely in three different persons.
In this life we can never fully understand the nature or the true unity of the Holy Trinity, but in Heaven we shall finally understand the beauty of the Trinity. The feast of the Blessed Trinity was first introduced in the 9th century and was only made part of the general calendar of the Church in the 14th century by Pope John XXII. Yet, the mystery of the Trinity goes back further to the time of the early Apostles. The Holy Trinity can be observed in the Gospel through the words of our Lord: “Go and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost” (Matthew 28:18).
Since the beginning, many lies and heresies have sprouted as Our Lord warned that many anti-christs would come. Some heretics taught Jesus was not God, there were 3 gods, and the 3 persons were just three different roles of the same person. All of these lies and heresies were condemned.
The Role of the Trinity in the Liturgy
Every homage paid to God by the Church's liturgy has the holy Trinity as its object. Time, as well as eternity, belongs to the Trinity. The Trinity is the scope of all religion. Every day, every hour, belongs to It. The feasts instituted in memory of the mysteries of our redemption center in It. The feast of the blessed Virgin and the saints are but so many means for leading us to the praise of the God who is One in essence, and Three in Persons. (Dom Gueranger OSB)
While the Father, Son, and Holy Spirit are each God, the three persons each has a separate purpose in relation to the salvation of the World. However, all the Divine Persons of the Trinity act in perfect unity since God is one and has but one purpose. While all of this is certainly confusing, we can only pray that through the Holy Ghost's inspiration, we can hope to understand the Trinity. In time we can understand the Trinity... Please purchase this lesson to continue learning.
Trinity Sunday (First Sunday after Pentecost) is part of the following course(s):