Today is Trinity Sunday, the feast that names what every Mass proclaims: Father, Son, and Holy Spirit. The readings don’t explain the Trinity as a doctrine. They show it as a revelation, and the thread running through them is this: God speaks His own name, and the name is mercy.
## What today’s readings give us
The First Reading takes us to Sinai after the golden calf, where Moses asks to see God’s glory. God passes by and proclaims His name: the LORD, merciful and gracious, slow to anger, abounding in steadfast love. The Second Reading, from 2 Corinthians, ends with Paul’s Trinitarian blessing: the grace of the Lord Jesus Christ, the love of God, and the fellowship of the Holy Spirit. The Gospel is John 3:16-18, the verses that compress the whole economy of salvation into three sentences.
## The line worth carrying with you
In Exodus 34, God doesn’t define Himself by power or sovereignty. He proclaims mercy first. The Douay-Rheims gives it this way: “The Lord, the Lord God, merciful and gracious, patient and of much compassion, and true.” That’s the name. Not abstract attributes, but a posture toward the world.
John 3:16 begins with the same movement outward: God so loved the world that He gave His only Son. The Trinity is not a puzzle to solve. It’s the shape of how God gives Himself. The Father sends. The Son is sent. The Spirit is the love between them, poured into us. Mercy is the name, and gift is the grammar.
## For today
Before you go to bed tonight, say the Sign of the Cross slowly. Name the three Persons aloud. Let the words carry what Exodus and John are saying: this is the God who names Himself by what He does for you.
Today’s full readings are at USCCB.
