Question: "What is Trinitarianism? Is Trinitarianism biblical?"
Answer: Trinitarianism is the teaching that God is triune, that He has revealed Himself in three co-equal and co-eternal Persons. For a detailed biblical presentation of the Trinity, please see our article on what the Bible teaches about the Trinity. The purpose of this article is to discuss the importance of Trinitarianism in regard to salvation and the Christian life.
We are often asked the question, “Do I have to believe in the Trinity to be saved?” The answer is yes and no. Does a person have to fully understand and agree with every aspect of Trinitarianism to be saved? No. Are there some aspects of Trinitarianism that play key roles in salvation? Yes. For example, the deity of Christ is crucially important to the doctrine of salvation. If Jesus were not God, His death could not have paid the infinite penalty of sin. Only God is infinite—He had no beginning, and He has no end. All other creatures, including angels, are finite; they were created at some point. Only the death of an infinite Being could atone for the sin of mankind throughout eternity. If Jesus were not God, He could not be the Savior, the Messiah, the Lamb of God who takes away the sin of the world (John 1:29). An unbiblical view of Jesus' divine nature results in an errant view of salvation. Every “Christian” cult that denies the true deity of Christ also teaches that we must add our own works to Christ's death in order to be saved. The true and full deity of Christ, an aspect of Trinitarianism, refutes this concept.
At the same time, we recognize that there are some genuine believers in Christ who do not hold to full Trinitarianism. While we reject modalism, we do not deny that a person can be saved while holding that God is not three Persons, but rather simply revealed Himself in three “modes.” The Trinity is a mystery, which no finite human being can fully, or perfectly, understand. For salvation to be received, God requires us to trust in Jesus Christ, God incarnate, as the Savior. For salvation to be received, God does not require complete adherence to every precept of sound biblical theology. No, full understanding and agreement with all aspects of Trinitarianism is not required for salvation.
We strongly hold that Trinitarianism is a biblically-based doctrine. We dogmatically proclaim that understanding and believing in biblical Trinitarianism is crucially important to understanding God, salvation, and the ongoing work of God in the lives of believers. At the same time, there have been godly men, genuine followers of Christ, who have had some disagreements with aspects of Trinitarianism. It is important to remember that we are not saved by having perfect doctrine. We are saved by trusting in our perfect Savior (John 3:16). Do we have to believe in some aspects of Trinitarianism to be saved? Yes. Do we have to fully agree with all areas of Trinitarianism to be saved? No.
Below is the best symbol for the Trinity we are aware of:
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