
One Body: The Holy Trinity, Part 1
Lesson 09 in our series (series began September 7, 2025)
Click here to view the lesson slides
Lesson Summary:
We commence our study of the Holy Trinity by asking "Why is confessing one God in three Persons essential to salvation—and why can’t Christianity survive without it?" Drawing on the Athanasian Creed, we distinguish what Christians must confess (not fully comprehend): the Father, the Son, and the Holy Spirit are one God, co-equal, co-eternal, to be worshiped in Trinity and in Unity. From the Shema (“Hear, O Israel… the LORD is one”) to Jesus’ own use of it, we trace how the Bible proclaims God as sole Creator and rightful Lord of all, and why His holy “jealousy” is pure and good. We also practice discernment by evaluating popular spiritual claims against God’s self-revelation in Scripture. Next time: moving from God’s unity to the three Persons—including considering why “begotten” is not the same as “made.”
Key takeaways:
Essential, not optional: The Trinity isn’t a puzzle for theologians; it’s the Church’s heartbeat. Without the Triune God, there is no Christian gospel.
Confess, don’t domesticate: We don’t measure God by personal experience or cultural ideals; we confess what He has revealed.
God’s oneness: Biblically, “one” is not a headcount but a claim—nothing is like Him. He alone creates, sustains, and commands our total worship.
Creator & Lord: Because God made all things, He rightly exercises dominion over all things—and delegates creaturely stewardship without surrendering His rule.
Athanasian clarity: Each Person is fully God and Lord, yet not three Gods or three Lords, but one God—to be worshiped in Trinity and Unity.
Biblical discernment: Test every spiritual statement by Scripture, not by what “works for me.”
Scripture referenced:
Deuteronomy 6:4; Exodus 20:1–3; Isaiah 44:6; Isaiah 40:28; Genesis 1:26–28; Matthew 22:36–38 (cf. Mark 12:29–31); Acts 17:24; Daniel 4:34–35; Colossians 1:15–17