The Solemnity of the Most Holy Trinity.
Readings and Antiphons on p. 1513 of the Daily Missal and p. 294 of the Sunday Missal. Year A

Entrance Antiphon.

Blest be God the Father, and the Only Begotten Son of God, and also the Holy Spirit: for he has shown us his merciful love.

First Reading: Exodus 34:4b-6.8-9

A reading from the Book of Exodus.

In those days:
Moses rose early in the morning and went up on Mount Sinai,
as the Lord had commanded him,
and took in his hand two tables of stone.
And the Lord descended in the cloud and stood with him there,
and proclaimed the name of the Lord.
The Lord passed before him, and proclaimed,
“The Lord, the Lord, a God merciful and gracious, slow to anger,
and abounding in steadfast love and faithfulness”
And Moses made haste to bow his head toward the earth,
and worshipped.
And he said,
“If now I have found favour in your sight, O Lord,
let the Lord, I pray you, go in the midst of us,
although it is a stiff-necked people;
and pardon our iniquity and our sin,
and take us for your inheritance.”

The Word of the Lord.

Responsorial Psalm: Daniel 3:29-30.31.33.32.34 (R. cf. 29b)

Let us now pray the Responsorial Psalm

R/. You are to be praised and highly exalted forever.

Blessed are you, O Lord, God of our fathers,
and to be praised and highly exalted forever;
And blessed is your glorious, holy name
and to be highly praised and highly exalted forever.

Blessed are you in the temple of your holy glory
and to be extolled and highly glorified forever.

Blessed are you upon the throne of your kingdom
and to be extolled and highly exalted forever.

Blessed are you, who sittest upon cherubim and lookest
upon the deeps, and to be praised and highly exalted forever.

Blessed are you in the firmament of heaven
and to be sung and glorified forever.

R/. You are to be praised and highly exalted forever.

Second Reading: 2 Corinthians 13:11-13

A reading from the Second Letter of Saint Paul to the Corinthians

Brothers and sisters, rejoice.
Mend your ways, heed my appeal,
agree with one another, live in peace,
and the God of love and peace will be with you.
Greet one another with a holy kiss.
All the saints greet you.
The grace of the Lord Jesus Christ and the love of God
and the fellowship of the Holy Spirit be with you all.

The Word of the Lord.

Alleluia, Alleluia.
Glory be to the Father, and to the Son, and to the Holy Spirit: to God who is, who was, and who is to come.
Alleluia.

Gospel: John 3:16-18

A reading from the Holy Gospel according to John.

God so loved the world that he gave his only-begotten Son,
that whoever believes in him should not perish but have eternal life. For God sent the Son into the world,
not to condemn the world,
but that the world might be saved through him.
He who believes in him is not condemned;
he who does not believe is condemned already,
because he has not believed
in the name of the only-begotten Son of God.

The Gospel of the Lord.

Communion Antiphon.

Since you are children of God, God has sent into your hearts the Spirit of his Son, the Spirit who cries out: Abba, Father.