"The grace of the Lord Jesus Christ,
and the love of God,
and the fellowship of the Holy Spirit be with you all!"
2 Corinthians 13:13
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The Trinity is the heart of divine revelation and of the Christian faith.
The Church teaches:
"The mystery of the Most Holy Trinity is the central mystery of Christian faith and life.
It is the mystery of God in Himself.
It is therefore the source of all the other mysteries of faith"
(Catechism, 234).
Because God is Trinity,
we are family,
and holiness is being one as the Father,
the Son, and the Spirit are One
(see Jn 17:21).
Because God is three Persons
in one God,
we,
though many,
are the one body of Christ
(1 Cor 12:12).
Because God is the Father,
the Son, and the Spirit,
we can become children of the Father and cry out in the Spirit,
"Abba" ("Father")
(Gal 4:6; Rm 8:15),
and "Jesus is Lord"
(1 Cor 12:3).
The Trinity is the basis of the Church,
the Bible,
the Creed,
the Sacraments,
the Beatitudes, etc.
We as Christians are constantly living in the Trinity and
the Trinity in us
(see Jn 17:23).
Because God is Trinity,
we can live forever in the mystery of His love.
"Praise the Holy Trinity,
undivided Unity,
holy God,
mighty God,
God immortal,
be adored!"