The doctrine of the Trinity is a foundational cardinal truth in Christianity. All three major Christian traditions – Protestant, Roman Catholic, and Eastern Orthodox – throughout the history of the Church, have been united on this doctrine. A denial of it constitutes a serious departure from the Christian faith and a rejection of the biblical witness to God as he has introduced himself to us. Sadly, many go astray from the faith due to their refusal to accept these truths. It is my purpose to give a brief overview of the doctrine.
Basic Definition: Christians worship one God who eternally exists in three persons, God the Father, God the Son, and God the Holy Spirit, all of whom are fully God, all of whom are equal.
Now let’s break each of these down.
Christians are monotheists. This doesn’t merely mean we worship only one God, but that we believe there exists only one God. This is a basic teaching throughout the Bible (Deut. 6:4; Isa. 44:6; Isa. 45:5; Mark 12:29; 1Tim. 2:5; 1Cor. 8:4).
While this finds support in the Bible, the very definition of God demands that there only be one. In other words, “God” is not just a being to whom you pray or ascribe great worth and value, but the transcendent creator of all things (Heb. 11:3). Romans 1:18-20 informs us that natural theology and rational thinking necessarily demand there be a singular source for all things. Polytheism (which is the belief in many gods) must redefine the term “god” to mean simply “really powerful beings,” since there cannot be many ultimate creators of all things. There can be only one Uncaused Cause, only one Unmoved Mover, and only one Uncreated Creator. God is the only non-contingent (not dependent) being in the universe. Therefore, his essence is necessarily one.
Eternally exists as three persons:
Christians do not believe in contradictions or logical fallacies. Rational thinking and harmony of truth are found in the essence of God’s being; therefore, God cannot exist as a contradiction. Christians do not believe in three Gods for the reasons listed above. However, we do believe Scripture has revealed that God, while one in essence, is three in person. We often talk about this as “one what, three whos.” While this is a great mystery in the Christian faith, there are many mysteries that we are compelled to believe due to necessity and what has been revealed in Scripture. For example, we believe that God created all things out of nothing (Heb. 11:3; doctrine of creation ex nihilo). We believe that God is the sovereign first cause of all things, yet man is morally responsible for his actions. We believe that while Christ was complete in his humanity, he also remained complete in his deity (often called the “hypostatic union”). We believe that the Bible is the product of humans and the product of God. None of these, including the doctrine of the Trinity, are contradictions, but they are great mysteries.
While the Bible does not use the word “Trinity,” we believe that it is an accurate description of what the Bible teaches concerning God. After all, the Bible does not use the word “Bible,” but we can legitimately use the word to describe a collection of books we believe to be inspired. The Bible does not use the word “aseity,” yet we believe that it accurately represents a Biblical attribute of God. God is “of himself,” in no way dependent upon humans for his livelihood (Ps. 50:7-12).
While there are many passages in the Bible which necessitate a Trinitarian understanding of God, there are a few that stand out more than others:
“In the beginning was the Word, and the Word was with God, and the Word was fully God.” (NET) Continue Reading →