The doctrine of the Trinity, along with the doctrine of the incarnation, is one of the great mysteries of the Christian faith. This means that it exceeds the ability of finite human minds to fully grasp…There is nothing in creation that is a precise analogy to the doctrine of the Trinity.

1. The doctrine of the Trinity is one of the most fundamental doctrines in Christianity.

The Christian doctrine of God is the doctrine of the Trinity, and the Christian doctrine of God is foundational to every other Christian doctrine. There is no doctrine of Scripture (bibliology) apart from the doctrine of God because Scripture is the Word of God. Human beings are created in the image of God. Sin is rebellion against the law of God. Soteriology is the doctrine having to do with the redemptive work of God. The church is the people of God. Eschatology has to do with the final goals and plans of God.

2. The doctrine of the Trinity was not invented at the Council of Nicaea.

There is a popular myth today that the doctrine of the Trinity was invented in the fourth century at the Council of Nicaea. This is not true. In the first centuries of the church, Christians were already teaching the fundamental doctrines they found in Scripture. Scripture teaches that there is one—and only one—God. Scripture also teaches that the Father is God. Scripture teaches that the Son is God and that the Holy Spirit is God. Furthermore, Scripture teaches that the Father is not the Son or the Spirit, that the Son is not the Father or the Spirit, and that the Spirit is not the Father or the Son. Anybody who held these basic propositions of Scripture held to the foundations of the doctrine of the Trinity. Over the centuries, there arose those whose teaching denied or distorted one or more of those biblical teachings. The Council of Nicaea was called to respond to one such teaching—the teaching of Arius, who had denied that the Son is God. The Nicene Creed provided boundaries to ensure that the church teaches everything Scripture affirms.

3. The doctrine of the Trinity is not fully comprehensible to human minds.

The doctrine of the Trinity, along with the doctrine of the incarnation, is one of the great mysteries of the Christian faith. This means that it exceeds the ability of finite human minds to fully grasp. If we treat the doctrine of the Trinity like some kind of math puzzle, requiring only the right amount of ingenuity to solve, we will inevitably fall into one heresy or another. The doctrine of the Trinity is not a Rubik’s Cube. There is nothing in creation that is a precise analogy to the doctrine of the Trinity.

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