All Christians believe the doctrine of the Trinity. If you do not believe this—that is, if you have come to a settled conclusion that the doctrine of the Trinity is not true—you are not a Christian at all. You are in fact a heretic. Those words may sound harsh, but they represent the judgment of the Christian church across the centuries. Christians in every land unite in proclaiming that our God eternally exists as Father, Son, and Holy Spirit.
Someone has said it this way: If you try to explain the Trinity, you will lose your mind. But if you deny it, you will lose your soul.
We believe in one living and true God who is the Creator of heaven and earth; who is eternal, almighty, unchangeable, infinitely powerful, wise, just and holy.
We believe that the one God eternally exists in three Persons: the Father, the Son, and the Holy Spirit; and that these three are one God, co-equal and co-eternal, having precisely the same nature and attributes, and worthy of precisely the same worship, confidence, and obedience. Matthew 3:16, 17; Matthew 28:19, 20; Mark 12:29; John 1:14; Acts 5:3, 4; II Corinthians 13:14.
One God and One Only
Exists in three Persons
Equal and Eternal
Worthy of equal praise and worship
Distinct yet acting in unity
Constituting the one true God of the Bible
When we say these things we mean that the Father is God, the Son is God, and the Holy Spirit is God, but they are not three gods but only one God. The Father is not the Son, the Son is not the Spirit, the Spirit is not the Father, but each is God individually and yet they are together the one true God of the Bible.
But the Trinity teaches us that before the foundation of the world, God was having fellowship within his own being. That's why the Bible tells us that the Father loves the Son (John 17:24). In some sense we can never understand that God the Father, God the Son, and God the Holy Spirit have forever communicated and loved each other.
It also teaches us that God is never "lonely." He didn't create us because he "needed" us. God could have existed forever without us. That he made us at all is a statement of his great love and the wisdom of his plan. There is so much we would like to know about God, but our finite minds cannot comprehend it. We are not free to create God in our own image.
The Trinity sets the limits for human speculation. God is more than the Trinity, but he is not less than that. After all, if we could explain God, he wouldn't be God. I have no doubt that God is much more than "one in essence, three in Person," but since I can't even understand those simple phrases, I don't worry at all about what else might be true about God. If you feel baffled by the Trinity, join the crowd. The greatest minds of history have stood in amazement before a God so great that he cannot be contained by our puny explanations.
We all know that God the Father is to be worshiped. But what about Jesus Christ? If he is God, should we not also worship him? The answer of course is yes. But that truth leads us back to the Trinity. He is not merely the Son of God but also God the Son. The same thing may be said about the Holy Spirit. He is not just a "force" but a Divine Person. Not an "influence" or some vague power, but the Third Person of the Trinity.
The Trinity should cause us to bow in humble adoration before a God who is greater than our minds could ever comprehend.