One Body: The Holy Trinity, Part 3
Lesson 11 in our series (series began September 7, 2025)
Click here to view the lesson slides
Lesson Summary:
In this final session on the Holy Trinity, we bring together everything explored over the past weeks: the unity of God’s essence, the distinction of the three persons, and why confessing the Trinity rightly is essential for Christian salvation. We revisit the danger of trying to “make the Trinity make sense,” noting how every historical heresy—from modalism to Arianism—began with attempts to subject God’s revelation to human logic. Instead, Scripture teaches us to confess the Trinity, not comprehend Him.
Pastor shows how the Divine Service itself forms us liturgically to speak the Triune Name faithfully—from Holy Baptism (being brought into the Name), to the Invocation, Gloria, Creed, Absolution, and finally the Aaronic Benediction in which God places His Name upon His people. We also examine the pitfalls of common Trinity analogies (water, sun/heat/light, the clover) and why each collapses into a historic heresy.
The class concludes with a discussion of whether Judaism, Islam, and Christianity worship the same God, why non-Trinitarian groups such as Oneness Pentecostals fall outside the Christian confession, and how denying the Trinity inevitably distorts salvation itself.
Scriptures Referenced:
Deuteronomy 6:4 – The Shema: God’s oneness.
Matthew 28:18–20 – Baptism into the one Name of Father, Son, and Holy Spirit.
Numbers 6:22–27 – God places His Name on His people through the benediction.
John 1:1–14 – The eternal Word who is God and with God.
John 14:16–17, 26 – Father, Son, and Spirit acting distinctly.
John 17:1–5 – The eternal relationship of Father and Son.
Colossians 1:13–14 – Transfer from darkness into the kingdom of the Son.
1 John 1:8–9 – Confession and absolution as a return to baptismal promise.
Matthew 3:16–17 – The Trinity revealed at Jesus’ baptism.
Titus 3:4–7 – Salvation by the mercy of the Father through the Son in the Spirit.
Isaiah 61:1–2 / Luke 4:16–21 – The Spirit-anointed Messiah.
Credit: You can watch the Lutheran Satire video referenced in this lesson here.