My brothers and sisters in Christ,1
Today we celebrate the “Feast of God.” The Most Holy Trinity is the central mystery of our Catholic faith.
Our readings today talk to us about this first amazing mystery. That our God is a communion of three divine persons in love — the Father, the Son and the Holy Spirit.
God created us and loves us as our Father. That’s what Moses is talking about in our first reading today.
God is also the Son who came into our world to share his life with us. That’s what Jesus is talking about in our Gospel passage for today.
And God is the Holy Spirit who gives us new life as children of God and causes the Trinity to dwell in our hearts. That’s what St. Paul is telling us in our second reading today.
My brothers and sisters, these beautiful readings today show us the beautiful truth of our faith, the Holy Trinity.
One way to think about it is that we all make the Sign of the Cross every time we pray. Christians have been doing that since the time of the apostles. So what are we really doing when we make that sign? We’re expressing our faith in the Trinity and our faith that the Trinity was revealed by Jesus on his Cross.
We touch our head and we say, “In the name of the Father.” Because he is the first person of the Trinity and our Creator.
Then we touch our hearts and we say, “and of the Son.” This reminds us that God the Son proceeds from the Father and came down from heaven to the womb of the Blessed Virgin Mary.
Then we touch our shoulders, moving from left to right as we say, “and of the Holy Spirit.” We do this because God the Holy Spirit proceeds from the Father and the Son; and in his love, the Spirit fills us, body and soul, with the life of God.
Now, another way to think about the Trinity is the way that St. John described it in one of his letters. He said very simply, “God is Love.”2
And the theologians and saints have helped us to see, that in his innermost heart — God is a communion of three divine Persons in love.
Remember, the human person is created in the image of God. That means that you and me — every one of us — are created in the image of the Most Holy Trinity. In the image of the God who is Love.
So the Trinity tells us the meaning of our lives. It tells us that we are made to share in the life of the Blessed Trinity. We are made to live a divine life in this world. As children of God. As temples of the Holy Spirit.
This is the basic reality of our Christian lives. Jesus said that if we love him and keep his commandments, that God will come — the Trinity — to make his home within us. St. Paul used to say, we are the temples of the living God.3
That’s the truth. God is dwelling in each us by his grace! But are we aware of it? Are we living this truth?
So this great feast today challenges us to examine ourselves. This feast calls us to really believe this and to really live with a greater awareness of this beautiful reality — of the Blessed Trinity’s presence with us.
The last words we hear from Jesus in our Gospel today are: “Behold! I am with you always.” This isn’t just a happy thought. It’s another way of expressing the beautiful spiritual reality of our lives. As we all remember, when Jesus was born, they called him Emmanuel. And as we know, that name means, “God with us.”
The mystery of the Trinity means that we have access to God — all the time.
No matter where we are, or what we’re doing — God is with us. Even when we are with others. We can talk to God all day long. Personally. In an intimate conversation. No matter how softly we speak, he still hears us. We can turn to him for help. For inspiration. All the time.
It’s so beautiful that we can talk to God as our loving Father. That we can walk with Jesus as our brother. And that we can live by the light and the gifts of their Spirit of love.
So in this Holy Mass and all throughout this whole week, let’s pray for the grace to deepen our awareness of the Blessed Trinity’s loving presence within our souls.
And let’s pray for the help of our Blessed Mother. Mary was the first person in whom the Trinity came to dwell — when the Father asked her to become the Mother of his Son by the power of their Holy Spirit. So let’s ask Mary to help us to grow in our devotion to the Blessed Trinity.
In the name of the Father, and of the Son and of the Spirit. Amen.
1. Readings (Solemnity of the Most Holy Trinity, Year B): Deut. 4:32-34, 39-40; Ps. 33:4-6, 18-20, 22; Rom. 8:14-17; Matt. 28:16-20.
2. 1 John 4:8, 16.
3. John 14:23; 2 Cor. 6:16.