Expert: Marco - 8/28/2007

Question
Why should an omnipresent and omnipotent God exist in three persons ETERNALLY?

Answer
Dear Lenin,

God is love. Love implies at least two perons loving each other. I do not think it is logical to ask "why God is three persons?" This is a Truth God has revealed us and we can only accept it as Truth.
No creature can ever understand God because God is infinitely superior to all of us.
Only the infinite intelligence of God can understand Who God is in His Essence.
God has revealed to be one in three Persons.
The three Divine Persons are distinct in their reciprocal relationships, but they are One substance.
It is not possible to explain this concept, but such concept can be understood through an intuition, an enlightment.
This enlightment is a gift from God.
Anyway our undertand of God is always partial and limited, because only God can know perfectly Himself.

The official teachings of the Catholic Church are given in the Catechism, so I report here a paragraph from the catechism about the Dogma of the Trinity.

III. THE HOLY TRINITY IN THE TEACHING OF THE FAITH
The formation of the Trinitarian dogma
249 From the beginning, the revealed truth of the Holy Trinity has been at the very root of the Church's living faith, principally by means of Baptism. It finds its expression in the rule of baptismal faith, formulated in the preaching, catechesis and prayer of the Church. Such formulations are already found in the apostolic writings, such as this salutation taken up in the Eucharistic liturgy: "The grace of the Lord Jesus Christ and the love of God and the fellowship of the Holy Spirit be with you all."[81]
250 During the first centuries the Church sought to clarify her Trinitarian faith, both to deepen her own understanding of the faith and to defend it against the errors that were deforming it. This clarification was the work of the early councils, aided by the theological work of the Church Fathers and sustained by the Christian people's sense of the faith.
251 In order to articulate the dogma of the Trinity, the Church had to develop her own terminology with the help of certain notions of philosophical origin: "substance", "person" or "hypostasis", "relation" and so on. In doing this, she did not submit the faith to human wisdom, but gave a new and unprecedented meaning to these terms, which from then on would be used to signify an ineffable mystery, "infinitely beyond all that we can humanly understand".[82]
252 The Church uses (I) the term "substance" (rendered also at times by "essence" or "nature") to designate the divine being in its unity, (II) the term "person" or "hypostasis" to designate the Father, Son and Holy Spirit in the real distinction among them, and (III) the term "relation" to designate the fact that their distinction lies in the relationship of each to the others.
The dogma of the Holy Trinity
253 The Trinity is One. We do not confess three Gods, but one God in three persons, the "consubstantial Trinity".[83] The divine persons do not share the one divinity among themselves but each of them is God whole and entire: "The Father is that which the Son is, the Son that which the Father is, the Father and the Son that which the Holy Spirit is, i.e. by nature one God."[84] In the words of the Fourth Lateran Council (1215), "Each of the persons is that supreme reality, viz., the divine substance, essence or nature."[85]
254 The divine persons are really distinct from one another. "God is one but not solitary."[86] "Father", "Son", "Holy Spirit" are not simply names designating modalities of the divine being, for they are really distinct from one another: "He is not the Father who is the Son, nor is the Son he who is the Father, nor is the Holy Spirit he who is the Father or the Son."[87] They are distinct from one another in their relations of origin: "It is the Father who generates, the Son who is begotten, and the Holy Spirit who proceeds."[88] The divine Unity is Triune.
255 The divine persons are relative to one another. Because it does not divide the divine unity, the real distinction of the persons from one another resides solely in the relationships which relate them to one another: "In the relational names of the persons the Father is related to the Son, the Son to the Father, and the Holy Spirit to both. While they are called three persons in view of their relations, we believe in one nature or substance."[89] Indeed "everything (in them) is one where there is no opposition of relationship."[90] "Because of that unity the Father is wholly in the Son and wholly in the Holy Spirit; the Son is wholly in the Father and wholly in the Holy Spirit; the Holy Spirit is wholly in the Father and wholly in the Son."[91]
256 St. Gregory of Nazianzus, also called "the Theologian", entrusts this summary of Trinitarian faith to the catechumens of Constantinople:
Above all guard for me this great deposit of faith for which I live and fight, which I want to take with me as a companion, and which makes me bear all evils and despise all pleasures: I mean the profession of faith in the Father and the Son and the Holy Spirit. I entrust it to you today. By it I am soon going to plunge you into water and raise you up from it. I give it to you as the companion and patron of your whole life. I give you but one divinity and power, existing one in three, and containing the three in a distinct way. Divinity without disparity of substance or nature, without superior degree that raises up or inferior degree that casts down. . . the infinite co-naturality of three infinites. Each person considered in himself is entirely God. . . the three considered together. . . I have not even begun to think of unity when the Trinity bathes me in its splendour. I have not even begun to think of the Trinity when unity grasps me. . [92]



I give here some verses from the Bible about the divine nature of Christ.

John 1: 1
In the beginning was the Word, and the Word was with God, and the Word was God.

In John 8:58, when quizzed about how he has special knowledge of Abraham, Jesus replies, "Truly, truly, I say to you, before Abraham was, I Am"—invoking and applying to himself the personal name of God—"I Am" or "Yahweh." His audience understood exactly what he was claiming about himself. "So they took up stones to throw at him; but Jesus hid himself, and went out of the temple" (John 8:59).
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In John 20:28, Thomas falls at Jesus’ feet, exclaiming, "My Lord and my God!"  
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In Philippians 2:6, Paul tells us that Christ Jesus "ho, being in very nature God, did not consider equality with God something to be grasped"
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Also significant are passages that apply the title "the First and the Last" to Jesus. This is one of the Old Testament titles of Yahweh: "Thus says Yahweh, the King of Israel and his Redeemer, Yahweh of armies: ‘I am the First and I am the Last; besides me there is no god’" (Is. 44:6; cf. 41:4, 48:12).
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This title is directly applied to Jesus three times in the book of Revelation: "When I saw him , I fell at his feet as though dead. But he laid his right hand upon me, saying, ‘Fear not, I am the First and the Last’" (Rev. 1:17). "And to the angel of the church in Smyrna write: ‘The words of the First and the Last, who died and came to life’" (Rev. 2:8). "Behold, I am coming soon, bringing my recompense, to repay every one for what he has done. I am the Alpha and the Omega, the First and the Last, the beginning and the end" (Rev. 22:12–13).
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This last quote is especially significant since it applies to Jesus the parallel title "the Alpha and the Omega," which Revelation earlier applied to the Lord God: "‘I am the Alpha and the Omega,’ says the Lord God, who is and who was and who is to come, the Almighty" (Rev. 1:8).

I hope this may help you.
Please ask again if you should need some clarifications.

Your brother in Christ,

Marco.