The Christian faith is built entirely upon the truth of who Jesus is. He is the eternal Son of God who took on human flesh, lived among us, died for our sins, and rose again. This truth is not a minor detail but the very bedrock of our salvation and our joy. To deny either His full divinity or His full humanity is to undermine the gospel itself. Our assurance and our worship are anchored in this unchanging reality. [01:04:14]
That which was from the beginning, which we have heard, which we have seen with our eyes, which we looked upon and have touched with our hands, concerning the word of life— the life was made manifest, and we have seen it, and testify to it and proclaim to you the eternal life, which was with the Father and was made manifest to us.
(1 John 1:1-2, ESV)
Reflection: As you consider the core truth that Jesus is both fully God and fully man, what difference does this doctrine make in your daily walk with Him and your sense of security in your salvation?
God desires for His children to live with confidence and assurance, free from the nagging doubt that can plague our hearts. He has given us His Word to provide clear tests that help us know we belong to Him. Right belief about Jesus is the first and most fundamental of these tests. It protects us from deception and anchors our souls in the truth that brings complete joy. [56:27]
I write these things to you who believe in the name of the Son of God, that you may know that you have eternal life.
(1 John 5:13, ESV)
Reflection: Where have you encountered teaching that subtly undermines the divinity or humanity of Jesus, and how can a deeper understanding of this right doctrine strengthen your faith and guard your heart?
Our faith is not based on clever myths or abstract ideas, but on historical, tangible events. The apostles were eyewitnesses who heard Jesus’s voice, saw His miracles, and touched His physical body. They testified to the truth that the Word became flesh and dwelt among us. This reality is our assurance that Jesus can truly represent us and serve as our mediator before the Father. [01:17:38]
Beloved, do not believe every spirit, but test the spirits to see whether they are from God, for many false prophets have gone out into the world. By this you know the Spirit of God: every spirit that confesses that Jesus Christ has come in the flesh is from God.
(1 John 4:1-2, ESV)
Reflection: How does the truth that God entered into our human experience—with all its physicality and frailty—comfort you and shape your approach to Him in prayer today?
True salvation is evidenced by a continued abiding in the truth of Christ. It is not merely a one-time prayer but a lifelong posture of trust and adherence to the teachings about Jesus. Those who truly know God will listen to the apostolic testimony and hold fast to it. This abiding is a key marker that distinguishes true faith from mere profession and brings the joy of certainty. [01:15:52]
Whoever knows God listens to us; whoever is not from God does not listen to us. By this we know the Spirit of truth and the spirit of error.
(1 John 4:6, ESV)
Reflection: In what ways does your life demonstrate an ongoing, abiding relationship with the truth of who Jesus is, rather than just a past decision?
The right doctrine of Christ was never meant to be held privately. It is good news to be proclaimed so that others might also enter into fellowship with the Father and the Son. As we hold firmly to this truth, we are also called to herald it, inviting others to experience the eternal life and complete joy that is found only in the God-man, Jesus Christ. [01:29:16]
that which we have seen and heard we proclaim also to you, so that you too may have fellowship with us; and indeed our fellowship is with the Father and with his Son Jesus Christ. And we are writing these things so that our joy may be complete.
(1 John 1:3-4, ESV)
Reflection: Who in your life needs to hear the good news about the true Jesus, and what is one practical step you can take this week to lovingly share this truth with them?
Worship opens with communion as a call to remember Christ’s work and to anticipate his return. The bread symbolizes a body broken for believers and the cup symbolizes the blood of the new covenant; participants are urged to examine hearts, repent, and partake in a reverent way that honors the covenant. Attention then shifts to the opening of First John: the letter aims to produce certainty—joy complete, freedom from sin, protection from deception, and assurance of salvation—by giving clear criteria to test both teaching and life. John articulates four stated reasons for writing: to complete joy, to help not sin, to avoid deception, and to know one is saved.
Three “litmus tests” anchor the letter’s pastoral polemic: right doctrine, righteous living, and radical love. Right doctrine centers on the person of Christ—both his eternal deity and his real humanity. John insists that the “Word of life” existed from the beginning, participated in creation, and revealed eternal life; at the same time, eyewitness testimony stresses hearing, seeing, long gazing on, and touching the incarnate Lord. Those who deny Christ’s full humanity or full deity are identified as antichrists and false teachers; such denial undermines mediation, atonement, and salvation.
Historical background situates the letter amid early Gnostic tendencies that minimized matter and thus denied the significance of Christ’s flesh. John writes decisively and pastorally to confront those errors while building believers up in apostolic truth. Practical outcomes follow: hold firmly to the apostolic teaching about Christ; proclaim the gospel so others may share fellowship with the Father and the Son; and let the assurance of eternal life produce complete joy. The letter functions both as a defensive rebuttal to doctrinal drift and as an affirmative roadmap for a community marked by sound belief, holy living, and mutual love, with the ultimate aim that believers know they belong to God and rejoice in that belonging.
So if you are one of those people who struggle with doubts wondering, am I truly saved? First John is the letter for you. It will help you know for certain whether or not you're saved. But I will warn you, this letter will expose those who are not saved. Those who think they are but really aren't and it will also expose the false teachers in our world that say they are saved but they are not.
[00:57:23]
(28 seconds)
#AssuranceOfSalvation
You see only God could bear the full penalty for all the sins of all who would believe in him. Only God could save men from their sins. Only God could be the mediator between God and man. One theologian said, if Jesus is not fully God, we have no salvation. There's no Christianity. He said, it's no accident that throughout history those groups that have given up belief in the deity of Christ have not remained long within Christian faith, but they have soon drifted toward the kind of religion represented by Unitarianism in The United States.
[01:14:26]
(33 seconds)
#DeityMatters
So hold firm to the right doctrine of Christ, herald the right doctrine of Christ, and for those who struggle without have complete joy in Christ, you have eternal life through Jesus. Verse four, these things we write so that our joy may be made complete. By the word our here, John didn't just mean his own, he meant our joy. Again, I can tell you from experience as one who struggled with doubt for many years, there is complete joy in knowing that I have eternal life through Jesus Christ.
[01:29:46]
(36 seconds)
#CompleteJoyInChrist
He administers the litmus test of right doctrine, righteous living, and radical loving. And if you know anything about a litmus test, they work to reveal whether something is or something is not. There's not any gray area. I actually like John because he doesn't really leave any room for gray area. He's a black and white kind of guy and he he administers a litmus test that'll help us know whether or not the teachers and teachings that we hear and are holding to are true or not and a litmus test to let us know and help us know whether or not we're truly saved or not.
[00:58:18]
(43 seconds)
#BiblicalLitmusTest
Well, here's the simple answer. John wrote to help his audience know whether the teachers and the teachings that they were hearing or holding to were teachings from the savior, and he wrote to help his audience know whether or not they and those teachers were saved. One pastor put it really well when he said this, he said, through John's letter, John will expose those who profess to know Christ but are not saved and he will assure those who know Christ but have doubts about their salvation.
[00:56:51]
(31 seconds)
#ExposeFalseTeachers
If Jesus was not fully human, he could not have been our mediator. If Jesus was not fully human, he could not have died in our place and paid the penalty for our sin. Praise God for the truth. Right? Not only was he fully God, he was fully man, which means he's able to be our mediator. He was able to die in our place and pay the price you and I owe. Christians, I pray that this right doctrine of Christ gives you certainty.
[01:23:04]
(27 seconds)
#FullyGodFullyMan
I pray today if he's exposed to you that you are not a Christian, that today will be the day that you'll repent of your sins, turn in faith to believing in the God man Jesus Christ who died on the cross for our sins and rose from the grave three days later. I pray today is the day you'll call on him and be saved and rejoice with us Christians that you have eternal life. Christianity rises or falls on the person of Jesus Christ.
[01:31:17]
(44 seconds)
#CallToRepentance
Right doctrine matters, specifically right doctrine of Christ because Christianity rises or falls on this divine and human nature of Jesus. The good news is the right doctrine is he's God the son who came in the flesh so that we could have eternal life. This doctrine protects us against deception. It brings assurance of salvation. And verse four, it brings us complete joy.
[01:27:52]
(28 seconds)
#RightDoctrineSaves
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