The Blessed Trinity takes an in-depth look at the mystery of the Blessed Trinity as revealed in Sacred Scripture.  Analyzing the Divine Life of God - Father, Son, and Holy Spirit - it presents a detailed look at the Person of Jesus Christ as the fulfillment of Divine Revelation, the role of the Holy Spirit in the Christian life, and how we can know the Father through the Son.  It also examines the Christian vocation and how God invites us to be in communion with him.

The Church professesher faith in the one God, who is at the same time the Most Holy and ineffable Trinity of Persons: Father, Son and Holy Spirit.  The Church lives by this truth contained in the most ancient symbols of faith.

Only "he who has wished to make himself known to us, and who 'dwelling in light inaccessible (1 Tm 6:16) is in himself above every name, above everything and above every created intellect...can give us right and full kn owledge of this reality by revealing himself as Father, Son and Holy Spirit, in whose eternal life we are by grace called to share, here below in the obscurity of faith and after death in eternal light."

God is incomprehensible to us.  He wished to reveal himself, not only as the one creator and Almighty Father, but also as Father, son, and Holy Spirit.  This revelation reveals in its essential source the truth about God, who is love: God is love in the interior itself of the one divinity.  This love is revealed as an ineffable communion of persons.  This "mystery the most profound, the mystery of the intimate life of God himself" has been revealed to us by Jesus Christ: "He who is in the bosom of the Father, he has made him known" (Jn 1:18).  The last words with which Christ concluded his earthly mission after the resurrection were addressed to the apostles, according to St. Matthew's Gospel: "Go therefore and make discipoles of all nations.  Baptize them in the name of the Father and of the Son and of the Holy Spirit" (Mt 28:19).  These words began the Church's mission and indicated her fundamental and constitutive task.  The Church's first task is to teacnh and baptize, to baptize means "to immerse" (therefor one baptizes with water) so that all may come to share God's Trinitarian life.
-Pope St. John Paul II, General Audience, October 9, 1985