“New and improved!”
You’ve seen it on every product from laundry detergent to toothpaste. In the world of marketing, new equals better. Even if a product has been around for decades, companies slap “new formula” on the label because we’re wired to chase the latest thing.
Remember New Coke? Yeah, that didn’t turn out so well.
The Apostle John faced a similar problem in the first-century church. False teachers called Gnostics were constantly peddling “new knowledge”—fresh spiritual insights that supposedly surpassed the basics of the faith. The word “Gnosticism” actually comes from the Greek word for knowledge (gnosis). These teachers were always looking for that next revelation, that upgraded understanding.
And John’s response? I’m not writing you anything new. I’m writing you something old.
Sometimes the oldest truths are exactly what we need to hear again.
The Context: John’s Letter to the Church
Before we dive into the passage, let’s remember what John has been building toward in his letter.
In 1 John 1:1 through 2:2, John establishes who Jesus is and what He has done. Jesus is the Word of eternal life. He is the light of the world. He is the Word made flesh—and John says, “We touched Him. We held Him. We saw Him.” Jesus came to shed His blood and cleanse us from all sin, offering Himself as the wrath-absorbing sacrifice for our sins.
That’s the foundation: Remember who Jesus is and what He has done.
Then, starting in 1 John 1:5 and continuing through our passage, John shifts to application: Now practice who you are in light of who Jesus is and what He has done.
First, he addressed our walk with God. You cannot claim to be in Christ and walk in darkness. Those two don’t go together.
Now he moves to our relationships with each other—and it turns out they flow from the same logic.
The Old Commandment: Love Your Neighbor as Yourself
Let’s look at what John writes in 1 John 2:7:
“Beloved, I am writing you no new commandment, but an old commandment that you had from the beginning. The old commandment is the word that you have heard.” — 1 John 2:7 (ESV)
This is a direct assault on those Gnostic teachers who were obsessed with finding something new. John is saying: What you need isn’t novel. It’s ancient. It’s what you heard from the very beginning of your faith journey.
So what is this old commandment? We get a clue from 2 John 5:
“And now I ask you, dear lady—not as though I were writing you a new commandment, but the one we have had from the beginning—that we love one another.” — 2 John 1:5 (ESV)
The old commandment is rooted in Scripture itself. When a religious leader tested Jesus by asking which commandment was greatest, Jesus quoted from the Old Testament:
“You shall love the Lord your God with all your heart and with all your soul and with all your mind. This is the great and first commandment. And a second is like it: You shall love your neighbor as yourself. On these two commandments depend all the Law and the Prophets.” — Matthew 22:37-40 (ESV)
That second commandment comes from Leviticus 19:18. The love your neighbor as yourself meaning has been there since Moses. It’s not new information.
This is a good reminder for the church today. I know of a young couple who didn’t want to attend a church like ours. They’d fallen under teaching that elevated visions, dreams, and “new apostles” to the same level as Scripture. They wanted something fresh. Something new.
That was a Gnostic view then. It shouldn’t be ours now.
The New Commandment: As I Have Loved You
But wait—didn’t Jesus give a new commandment? John addresses this in verse 8:
“At the same time, it is a new commandment that I am writing to you, which is true in him and in you, because the darkness is passing away and the true light is already shining.” — 1 John 2:8 (ESV)
So what is the new commandment Jesus gave?
On the night He was betrayed, in the upper room with His disciples, Jesus said:
“A new commandment I give to you, that you love one another: just as I have loved you, you also are to love one another.” — John 13:34 (ESV)
Do you see the shift?
The old commandment said: Love your neighbor as yourself. That’s the golden rule—do unto others as you would have them do unto you.
The new commandment says: Love one another as I have loved you.
That’s a completely different standard.
How Did Jesus Love Us and How Should We Love Others?
How did Christ love us? Paul spells it out:
“Husbands, love your wives, as Christ loved the church and gave himself up for her.” — Ephesians 5:25 (ESV)
And:
“For while we were still weak, at the right time Christ died for the ungodly. For one will scarcely die for a righteous person—though perhaps for a good person one would dare even to die—but God shows his love for us in that while we were still sinners, Christ died for us.” — Romans 5:6-8 (ESV)
Jesus didn’t love us because we were lovable. He loved us while we were His enemies. He gave Himself up for us—completely, sacrificially, without reservation.
That’s the new standard. Not “love others as much as you love yourself.” Love others as Christ loved you—which means laying down your life.
Why This Mattered in the Upper Room
Think about the context of when Jesus gave this command. It was the night before His crucifixion. Within hours, every single disciple would abandon Him. Peter would deny Him three times. They’d all scatter.
Can you imagine the aftermath? The natural tendency would be to assign blame. To shame one another.
“Peter, you said you’d die for Him. Where were you when it all went down? Running off just like the rest of us.”
“And John—you ran off without your cloak! Remember when that guy grabbed it and you just kept running?”
The finger-pointing could have been endless. But Jesus said: None of that. You will love one another as I have loved you.
This command was vital for the early church. It’s just as vital today.
Walking in the Commandment: The Test of True Faith
Now John gets practical—and uncomfortable:
“Whoever says he is in the light and hates his brother is still in darkness. Whoever loves his brother abides in the light, and in him there is no cause for stumbling. But whoever hates his brother is in the darkness and walks in the darkness, and does not know where he is going, because the darkness has blinded his eyes.” — 1 John 2:9-11 (ESV)
This is a stark warning. What does 1 John say about loving your brother? If you hate him, you’re not in the light—no matter what you claim.
Walking in Darkness vs Walking in Light
Remember what John wrote earlier:
“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. If we say we have fellowship with him while we walk in darkness, we lie and do not practice the truth.” — 1 John 1:5-6 (ESV)
John is applying the same logic to our relationships. To claim you’re in the light (that is, in intimate fellowship with Christ) while hating your brother? Those two don’t go together.
Think about the difference between types of relationships. You have a relationship with your mechanic. With the cashier at the grocery store. With your barber. But would you call those deep, intimate, personal relationships?
Compare that to your relationship with your spouse. It’s different, right? Deep. Intimate. You know each other.
A claim to be “in the light” is a claim to have that kind of close, intimate fellowship with Christ. And yet to hate your brother while making that claim? John says you’re deceiving yourself.
What Does Hatred Actually Look Like?
Here’s where it gets convicting. We tend to think of hatred as something dramatic—plotting revenge, wishing someone dead.
But consider this: King David was called “a man after God’s own heart.” And yet what did he do? He committed adultery with another man’s wife. When she got pregnant, he tried to cover it up. When that didn’t work, he had her husband killed.
One commentator described murder as “the final expression of hate.”
Would we say David wasn’t a believer? Of course not. And yet his actions demonstrated hatred for his brother.
What about us? When someone says something that offends us, what do we do? Do we go to them directly? Or do we go to someone else first? “Did you hear what he just said?”
That’s a form of hatred. Let’s not mince words.
The evidence of true faith isn’t just avoiding murder. It’s actively loving your brothers and sisters—even the difficult ones.
The Power to Keep the Commandment
At this point, you might be feeling pretty discouraged. I know I was. I don’t love my brothers as I ought. I don’t know Christ as I ought.
But John doesn’t leave us condemned. Look at verses 12-14:
“I am writing to you, little children, because your sins are forgiven for his name’s sake. I am writing to you, fathers, because you know him who is from the beginning. I am writing to you, young men, because you have overcome the evil one. I write to you, children, because you know the Father. I write to you, fathers, because you know him who is from the beginning. I write to you, young men, because you are strong, and the word of God abides in you, and you have overcome the evil one.” — 1 John 2:12-14 (ESV)
After all those warnings, John is now encouraging his readers. He’s saying: You have spiritual assets. You’re not starting from zero.
Do Christians Already Have What They Need to Obey?
Here’s a fascinating illustration. A few years ago, there was a documentary about babies that explored their development from birth through toddlerhood. What researchers found was remarkable: babies are born with the ability to crawl—they just haven’t developed the strength yet.
If you’ve ever had a newborn, you know this. You lay them down in one corner of the crib, and somehow they’ve wiggled to the other corner by morning. The researchers supported babies in a way that took their weight off, and newborns were actually making crawling motions.
The point? They already had what they needed. They just hadn’t developed it yet.
That’s the message of Scripture for believers. You already have what you need to obey the commandment.
Peter wrote:
“His divine power has granted to us all things that pertain to life and godliness, through the knowledge of him who called us to his own glory and excellence.” — 2 Peter 1:3 (ESV)
Through the Holy Spirit, you have everything required for life and godliness. You’re not lacking resources. You’re not waiting for God to give you more power. You have it.
You Have to Grab Hold of It
But here’s the catch: you’re not passive in this.
Paul wrote:
“So you also must consider yourselves dead to sin and alive to God in Christ Jesus.” — Romans 6:11 (ESV)
And:
“Put on then, as God’s chosen ones, holy and beloved, compassionate hearts, kindness, humility, meekness, and patience, bearing with one another and, if one has a complaint against another, forgiving each other; as the Lord has forgiven you, so you also must forgive. And above all these put on love, which binds everything together in perfect harmony.” — Colossians 3:12-14 (ESV)
Notice the active language. Consider yourselves. Put on compassion. Put on love.
It’s like a gift sitting on a table with your name on it. You don’t have to earn it—it’s already yours. But you do have to reach out and grab it.
Abiding in Christ evidence shows up when we actively put on what we’ve been given. Fellowship with God and believers flows from recognizing what we already possess and walking in it.
How to Love Other Christians: Practical Application
So what does this look like practically? How do we actually love other Christians—especially the ones who irritate us?
1. Remember the Gospel Constantly
How could we not love our brothers if we continually remind ourselves of the gospel? We were enemies of God, and Christ died for us anyway. We were unlovable, and He loved us. That brother who annoys you? Christ died for him too.
2. Go Directly to People
When someone offends you, go to them first—not to everyone else. Matthew 18 is clear on this. Gossip disguised as “prayer requests” is still hatred.
3. Reckon Yourself Dead to Sin
You have to actually believe you have the power to respond differently. Stop telling yourself, “That’s just how I am.” No—you’re a new creation. Reckon it to be true.
4. Put On Love Actively
This isn’t passive. Every morning, you decide to put on compassion, kindness, humility, patience. You choose to bear with difficult people. You choose to forgive as you’ve been forgiven.
5. Practice
The author of Hebrews says solid food is for the mature “who have their powers of discernment trained by constant practice” (Hebrews 5:14). You get better at loving by practicing love—even when it’s hard.
Something Old Is Exactly What We Need
The Gnostics wanted new knowledge. The Athenians wanted new ideas. Our culture wants new experiences.
But sometimes the oldest truths are the ones we most need to hear again.
Love your neighbor as yourself. Love one another as Christ loved you. Walk in the light. Hate is incompatible with claiming to know God.
These aren’t new ideas. They’re ancient ones. And they’re exactly what the church needs today.
You already have what you need to obey. Now grab hold of it.
