by Justan Borth
Over the past several posts, we’ve been exploring the attributes of God—both communicable and incommunicable—and how those attributes meet us right where we are. But there’s one truth about God that stands above the rest in both depth and significance. It has fascinated theologians and everyday Christians for centuries. This truth doesn’t just describe what God is like; it speaks to who God is at His very core. That truth is the Trinity.
You would be hard-pressed to find a doctrine that is both so foundational to Christianity and so often misunderstood or debated. Because of that, we’re going to slow down and spend the next few weeks exploring different aspects of the Trinity together.
To begin, it’s helpful to start with a clear definition. Our friend, Wayne Grudem, in Systematic Theology, defines the Trinity this way:
“God eternally exists as three persons—Father, Son, and Holy Spirit—and each person is fully God, and there is one God.”
That’s a dense sentence, but it captures the heart of what Christians believe about God.
One of the clearest moments in all of Scripture that points to the Trinity happens at the baptism of Jesus in Matthew 3:16–17:
“When Jesus was baptized, he went up immediately from the water. The heavens suddenly opened for him, and he saw the Spirit of God descending like a dove and coming down on him. And a voice from heaven said, ‘This is my beloved Son, with whom I am well pleased.’”
In this moment, all three persons of the Trinity appear at the same time, each acting in a distinct way. The Son stands in the water being baptized. The Spirit descends from heaven, empowering Jesus for ministry. The Father speaks, affirming His love and pleasure in the Son. This isn’t God switching roles or wearing different masks—it’s three distinct persons acting together in perfect unity.
The Trinity can be summarized with three essential statements:
- God is three persons.
- Each person is fully God.
- There is one God.
These statements matter because they protect us from misunderstanding who God is. Christianity is not polytheistic—we do not believe in three gods. There is only one God. At the same time, God exists eternally as Father, Son, and Holy Spirit. Each person is distinct, yet fully shares the same divine nature. The Father is not the Son. The Son is not the Spirit. The Spirit is not the Father. And yet, they are one in essence, purpose, and will.
Another fantastic line from Grudem puts this into sharper focus: “Not only are the three different persons of the Trinity one in purpose and in agreement on what they think, but they are also one in essence, in their nature.”
So why does all of this matter?
Simply put, the Trinity matters because it’s who God is. If we want to know God—not just facts about Him, but His very nature—we must wrestle with the Trinity. To understand salvation, we need to know the Father who sends, the Son who saves, and the Spirit who brings new life. Knowing God means knowing Him as Father, Son, and Holy Spirit.
And while we may never fully comprehend the Trinity, we can know God truly—and that is more than enough.
Reflective Questions:
-When you think about God, which person of the Trinity do you relate to most right now—the Father, the Son, or the Holy Spirit? Why?
-How does knowing that God exists in perfect relationship within Himself (Father, Son, and Spirit) change the way you think about relationships and community?
-How does seeing all three persons of the Trinity at Jesus’ baptism help you understand God’s involvement in your own life today?
Further Reading: John 3

