Christians are often called “People of the Book” because we believe that God has spoken. We do not construct our understanding of God through speculation or philosophy; we receive it from what He has made known in His Word. The Scriptures are the final and sufficient authority for all that we believe and confess.
At the very center of this revelation stand three foundational doctrines: the Trinity, the Incarnation, and the Resurrection. These truths are not peripheral. They define who God is, how He has acted in history, and where our hope rests. To misunderstand them is to distort Christianity itself.
The Trinity
The God who exists has revealed Himself in history and in the Scriptures that bear witness to His saving acts. What He reveals about His own nature transcends human expectation. The doctrine of the Trinity is not the product of philosophical speculation; it rests upon God’s self-disclosure in His Word.
The Trinity teaches that God is one being in three persons: the Father, the Son, and the Holy Spirit. Each Person is fully and eternally God, equal in glory and majesty, yet there are not three gods but one God. This truth surpasses human categories. It is not a contradiction, but a revealed mystery — one that we receive because God has made it known.
No analogy can fully capture the Trinity. Popular comparisons — such as water existing as ice, liquid, and steam — ultimately distort the doctrine by collapsing the distinctions between the divine Persons or by implying change within God’s being. Such illustrations may appear helpful, but they inevitably distort the doctrine and diminish the uniqueness of the Triune God. Therefore, we must resist relying on them.
Importantly, the New Testament does not attempt to construct a philosophical explanation of the Trinity; it simply assumes it. The Father sends the Son. The Son obeys the Father. The Spirit descends and empowers. The Apostles were, in this sense, experiential Trinitarians — they heard the Father’s voice from heaven, walked with the Son, and witnessed the Spirit descending upon Him (). As the New Testament authors wrote, they weren’t trying to explain the Trinity systematically; rather, it was woven into their theological framework.
This pattern is evident in both worship and practice. Paul blesses the church with “the grace of the Lord Jesus Christ and the love of God and the fellowship of the Holy Spirit” (). Christ commands that disciples be baptized “in the name of the Father and of the Son and of the Holy Spirit” (). Throughout the New Testament, the unity of God and the distinct personhood and full deity of the Father, Son, and Spirit permeate its teaching (; ; ).
The Incarnation
The Scriptures not only reveal that God is Triune; they also proclaim that the eternal Son became man. The One who was with the Father from all eternity entered into His own creation. Sent according to the Father’s eternal will, He came to redeem and to unite all things in Himself, both in heaven and on earth. His name is Jesus ().
This claim is staggering in its historical reality. If you had lived in the Middle East two thousand years ago, you could have seen Him, heard Him speak, and watched Him walk the dusty roads of Galilee. The eternal Son of God did not remain distant; He drew near. The biblical authors proclaim this boldly — not as myth or metaphor, but as truth — many sealed their witness with their lives.
The Apostle John writes with unmistakable clarity:
By this you know the Spirit of God: every spirit that confesses that Jesus Christ has come in the flesh is from God… and every spirit that does not confess Jesus is not from God.
The Incarnation is not a peripheral doctrine. It is a dividing line. To deny that the Son has come in the flesh is to reject God’s own revelation and to undermine the heart of the gospel. To deny this is to stand in opposition to God.
In the Incarnation, the Son did not cease to be God; He assumed a true human nature. His deity was not diminished, altered, or set aside. Rather, humanity was added to His divine person (). The two natures are neither blended nor divided; each remains fully intact in the one person of Jesus Christ. He is fully God and fully man — one Person forever.
This mystery should not intimidate us into silence, nor should its depth cause us to doubt its truth. We receive what God has revealed. The Word became flesh and dwelt among us (). Born of a woman (), sharing in our humanity (), He entered our world in order to save it. In Christ, God has drawn near — not in abstraction, but in flesh and blood.
The Resurrection
The eternal Son who took on flesh did not remain in the grave. After dying a substitutionary death on a Roman cross — bearing the punishment foretold in — He rose bodily from the dead on the third day. This was not symbolic renewal or spiritual metaphor; it was a historical event that stands at the very center of the Christian faith.
The Apostle Paul makes this unmistakably clear:
“If Christ has not been raised, then our preaching is in vain and your faith is in vain.”
Without the Resurrection, Christianity collapses. But Christ has been raised. Death did not hold Him. The grave did not defeat Him.
The Resurrection was witnessed, proclaimed, and preserved in Scripture. The Gospels record the empty tomb and the appearances of the risen Christ — to the women who first arrived at the tomb, to the disciples on the road to Emmaus, to the gathered apostles in Jerusalem, and even to Thomas, who doubted until he saw and touched the risen Lord (; ; ). For forty days He appeared to many, speaking about the kingdom of God before ascending into heaven (). The Resurrection rests not on legend, but on eyewitness testimony.
Yet the Resurrection is not merely an event to be affirmed; it is the foundation of our hope. Christ is “the firstfruits” (). Because He lives, those who belong to Him will also be raised. His victory over death guarantees the future resurrection of all who trust in Him.
When Jesus declared, “I am the Resurrection and the Life” (), He was not merely describing an ability to raise people from the dead — He was revealing His identity. He Himself is the source of life now and beyond the grave. In raising Lazarus, He demonstrated in miniature what He would accomplish in fullness through His own triumph over death.
The Resurrection assures us that sin has been conquered, death has been defeated, and salvation is secure. In Christ, hope is not wishful thinking; it is anchored in a risen Lord.
Do you believe this?
A Call to Worship
The doctrines of the Trinity, the Incarnation, and the Resurrection are not isolated teachings. They form the foundation upon which every other Christian doctrine rests. Like threads woven into a tapestry, they uphold the integrity and beauty of the entire fabric of the Christian faith.
Because God has spoken, we are not left to speculation or uncertainty. He has made Himself known. To understand these truths is to stand within the stream of historic, orthodox Christianity, guarded from error and anchored in the revelation He has given.
May these doctrines deepen your worship of the Triune God. May they steady your confidence in Christ and strengthen your assurance of salvation. May they embolden you in personal evangelism, enabling you to speak of Christ with clarity and conviction. May they draw you ever further into the Scriptures, that you might be spiritually mature, rooted firmly in the Word and steadfast in the obedience of faith. And may these truths not only shape your understanding but also stir your heart to love and adore the God who has revealed Himself and redeemed His people.
Now to Him who is able to strengthen you according to my gospel and the preaching of Jesus Christ, according to the revelation of the mystery that was kept secret for long ages but has now been disclosed and made known to all nations, according to the command of the eternal God, to bring about the obedience of faith — to the only wise God be glory forevermore through Jesus Christ! Amen.