This foundational truth reveals God's very nature. He is the source of all life, both physical and spiritual. He is morally pure, holy, and righteous, defining all that is good. His character is the absolute standard of truth, and there is no trace of evil or sin in Him. This truth is the bedrock upon which our understanding of everything else is built. [50:08]
This is the message we have heard from him and proclaim to you, that God is light, and in him is no darkness at all. (1 John 1:5, ESV)
Reflection: As you consider the truth that God is pure light with no darkness, what specific aspect of His holy nature—such as His goodness, truth, or life-giving power—most captivates your heart today?
A claim of salvation is more than just words; it is validated by a life that is being transformed. A continuous, habitual walk in darkness—a lifestyle characterized by unrighteousness—reveals a heart that does not truly know God. Our actions provide evidence of the reality of our faith, showing whether we are living in the truth we profess. [56:35]
If we say we have fellowship with him while we walk in darkness, we lie and do not practice the truth. (1 John 1:6, ESV)
Reflection: In what specific area of your daily life do you see the most consistent growth in reflecting God's light, and where do you sense a need for greater dependence on the Spirit to walk in His truth?
Those who walk continuously in the light as God is in the light enjoy genuine fellowship with Him and with other believers. This walk is not a sinless perfection but a life marked by a devotion to God's ways. The beautiful promise for those who walk in this light is the ongoing cleansing power of the blood of Jesus, which purifies us from all sin. [01:01:08]
But if we walk in the light as he is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin. (1 John 1:7, ESV)
Reflection: How does the promise that Jesus’ blood continually cleanses you from sin free you to be honest about your struggles and to pursue authentic fellowship with other believers?
We are called to be wise and discerning, applying the litmus test of God's Word to the teachings we encounter. Any teaching that denies what God clearly calls sin is promoting darkness, not light. Such teachings reveal that the speaker does not have fellowship with God, and we must guard our hearts by avoiding them. [01:04:27]
Beware of false prophets, who come to you in sheep's clothing but inwardly are ravenous wolves. You will recognize them by their fruits. (Matthew 7:15-16a, ESV)
Reflection: What is one specific teaching or cultural idea you have recently encountered that contradicts God's Word, and how can you actively hold it up against the truth of Scripture this week?
The most important application of this truth is to our own lives. We must prayerfully allow the light of God's Word to examine the waters of our hearts. This test can bring the conviction that leads to salvation for some and the comforting assurance of salvation for those who struggle with doubt. [01:14:33]
Search me, O God, and know my heart! Try me and know my thoughts! And see if there be any grievous way in me, and lead me in the way everlasting! (Psalm 139:23-24, ESV)
Reflection: As you prayerfully allow God's light to search your heart, what does it reveal? Does it bring a sense of conviction leading to repentance or a confirmation of His work and fellowship in your life?
A baptismal litmus-test image introduces a simple practice—clean, fill, and test water—to teach a spiritual method for evaluating hearts and teachings. First John 1:5–7 serves as that spiritual litmus test: “God is light” defines God as the source of life, moral purity, and ultimate truth, and any claim of fellowship with God must square with that reality. The letter exposes two contrasting walks: a habitual walk in darkness, marked by unrepentant sin and theological error, and a habitual walk in light, marked by repentance, righteousness, and mutual fellowship. The criterion for genuine fellowship centers on continuity—continuous living in God’s truth rather than isolated acts or mere professions.
Right doctrine, righteous living, and radical loving form three practical checks. Right doctrine upholds the incarnation and the moral claims of Scripture; denying biblical definitions of sin or reinterpreting them to permit unrighteous living signals dissonance with God’s light. Righteous living shows itself in persistent patterns: believers still sin, but true fellowship displays a prevailing bent toward confession, repentance, and the fruit of light—goodness, righteousness, and truth—rather than ongoing indulgence in sexual immorality, greed, drunkenness, or abusive speech. Radical loving appears as tangible fellowship with other believers; public profession of union with God finds confirmation in transparent, reconciled relationships.
Applied outwardly, the test warns against teachers who redefine sin to fit cultural norms; teaching that permits what Scripture calls sin reveals acceptance of darkness and disqualifies trust. Applied inwardly, the test examines the routine shape of life: if darkness predominates, the profession of salvation exposes self-deception and calls for repentance. Applied pastorally, the test pursues clarity and pastoral care: expose false teaching, protect the flock, call the deceived to Christ, and assure doubting believers by pointing to ongoing fidelity to God’s truth. The closing call urges those living in darkness to confess and turn, promising cleansing by the blood of Jesus and restoration to fellowship for all who repent and believe.
This week, we were preparing the baptismal for a baptism we're doing at the end of the service today. And, when we do that, we it kinda really just involves three simple things. We we clean it, which I'm certain you're glad to hear that. Because we have yet to find a lid that really fits it, we fill it with water, and then we check the water with these little things we call litmus tests. They're they're pretty simple, pretty easy to use. If you've never used one, you take this small strip that has four squares on it,
[00:37:44]
(38 seconds)
#BaptismPrepLitmus
four little litmus squares on it. You dip it into the water for about fifteen seconds, and you pull it out and you compare it to the colors on the back of this little bottle that they send with it. And when you do that, you're able to check the, bromine, the hardness, the alkalinity, and the pH of the water. So in other words, this litmus test reveals the true nature of the water. And like litmus test work to reveal the true nature of water, God has given us a letter in his word that we can dip into the waters of our hearts that works just like a litmus test
[00:38:22]
(45 seconds)
#LitmusOfTheHeart
to reveal the true nature of people, to help us know whether or not we are truly saved. That letter is first John, and we began studying it last Sunday. This morning, we're gonna continue dipping the litmus test of first John into the waters of our heart so that we may know. So if you have your bibles, I'm gonna ask you to take them out and open them with me to first John chapter one. Today, we're just gonna be looking at three verses, verses five through seven.
[00:39:06]
(37 seconds)
#FirstJohnStudy
So if you wanna know if someone's saved, if you wanna know if you were saved, if you wanna know if a teacher that you are listening to is a true teacher or a false teacher that you should avoid. John writes, if we say we have fellowship with him while we walk in darkness, we lie and do not practice the truth. Today, we would say, if we say we have eternal life or if we say we are saved. Back then, John says they would say, yeah, I have fellowship with him. John just simply means if a person says, I'm saved while they walk in darkness let's break that down for a moment. To walk means to live, to behave.
[00:55:12]
(43 seconds)
#WalkNotWords
And this here refers to a continuous walk, a continuous living in a certain manner, in a certain way. So John is talking about a habitual continuous lifestyle in a certain manner. So he's saying, if if we say we're saved with God who's light, while we heal habitually walk in darkness to walk in darkness means to walk in evil, to walk in wickedness, to walk in unholiness or unrighteousness. As we're gonna see throughout this letter, walking in darkness will be equated to walking in unrighteous living and not loving one another. John saying if I wanna know if a person's saved or not. Don't just listen to their profession. I have fellowship with God. I'm saved. He says, look at the fruit in their life.
[00:55:54]
(49 seconds)
#HabitsRevealFaith
So let me ask you this. When this litmus test of darkness and lies, light is dipped into the water of your life, what does it reveal? Does your life consist more of adultery, murder, stealing, coveting, sexual immorality, impurity, greed, filthiness, foolish talk, vulgar joking, and idolatry? Is it more defined by carousing, drunkenness, sexual promiscuity, debauchery, strife, and jealousy? If so, the litmus test of righteousness is saying your profession is not true. You may think you are saved, but you are deceived, you are still in your sin, and the blood of Jesus has not cleansed you. So what is it revealing?
[01:14:09]
(53 seconds)
#FruitOfDarkness
The good news is this, if it's revealing nothing but darkness, a life that's consumed with more darkness, the good news is you can still be saved. There's still time. Jesus died on the cross for our sins. He was buried. He rose on the third day. This is good news because the blood of God's son cleanses people from all their sin. If you'll confess your sins to God, turn in faith to trusting in his son who died and rose again for your salvation, the promise of God's words, he'll cleanse you of all your sins, give you his righteousness, and bring you into fellowship with him. Then you can truly say, I have fellowship with God.
[01:15:02]
(51 seconds)
#ForgivenessThroughChrist
You know, study of the scriptures and in particular, the gospel of John, the same author who wrote this letter, we can grasp what God is light means. First, God is light means that God is by his very nature and his very being the source of life. He is the source of physical life, and he is the source of spiritual life. Jesus, God the son, said he is the light of the world. Anyone who follows him will never walk in darkness but will have the light of life. So through Jesus, God the son, the one who came in the flesh, through him is life. The one who is the light of the world.
[00:50:21]
(42 seconds)
#GodIsLight
God is light means that God is by his very nature and his very being the source of life. He is the source of physical life, and he is the source of spiritual life. Jesus, God the son, said he is the light of the world. Anyone who follows him will never walk in darkness but will have the light of life. So through Jesus, God the son, the one who came in the flesh, through him is life. The one who is the light of the world.
[00:50:31]
(31 seconds)
physical life, and he is the source of spiritual life. Jesus, God the son, said he is the light of the world. Anyone who follows him will never walk in darkness but will have the light of life. So through Jesus, God the son, the one who came in the flesh, through him is life. The one who is the light of the world. Through him, we have the light of life. We have fellowship with God.
[00:50:41]
(27 seconds)
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