When “love one another” becomes a slogan, John asks a sharper question
We say the word “love” far too easily.
“I love you.” “I love my church.” “I love this community.” Sometimes those words are true. Sometimes they are just what we say when a warm feeling passes through us — and that feeling, as it turns out, dissolves the moment someone disappoints us.
Have you ever felt this? You genuinely cared for a brother or sister in Christ — but when the caring became costly, when the giving wasn’t acknowledged, when showing up started to feel like a drain — you quietly withdrew. The heart closed.
That is exactly what 1 John 3:16–18 is about.
“This is how we know what love is: Jesus Christ laid down his life for us. And we ought to lay down our lives for our brothers and sisters. If anyone has material possessions and sees a brother or sister in need but has no pity on them, how can the love of God be in that person? Dear children, let us not love with words or speech but with actions and in truth.”
1 John 3:16–18, NIV
The definition of love starts with Jesus
John does something unusual here. He doesn’t begin by defining love and then commanding us to practice it. He says: if you want to know what love actually is, look at what Jesus did.
“This is how we know what love is: Jesus Christ laid down his life for us.”
There is something almost shocking in the tone. As if John is saying: before Jesus, we didn’t really know what love was. We thought love was an emotion — an appreciation, a warmth that arose when someone was easy to be around.
But the cross says: no. Love, at its core, is giving yourself when the other person cannot repay you. It is choosing to move toward someone even when it costs you something to do so. It is walking toward a person who is undeserving, ungrateful, even hostile — and going anyway.
This is not a feeling. It is a direction, a will, a choice.
Cain’s mirror: hatred is love’s opposite
In the same passage, John points to Cain (1 John 3:12).
Why did Cain kill Abel? On the surface, jealousy. At a deeper level, something darker: an inability to tolerate another person receiving what he did not. He didn’t start by closing off compassion — he never opened it. His inner world was built on comparison, on ledgers, on “why him and not me.”
John’s words here are severe: “Anyone who hates a brother or sister is a murderer” (1 John 3:15, NIV).
We resist that language. We wouldn’t say we hate anyone. But what John is describing may be more subtle: the flatness in your chest when a friend shares good news; the way you scroll past a need you saw and told yourself someone else would handle it; the polite surface-level warmth in community that masks a quiet distance underneath.
All of these are ways of closing off compassion — of “having no pity.” And John’s question cuts: if that is how we live, how can the love of God be in us?
From words to action: love needs a concrete moment
“Let us not love with words or speech but with actions and in truth.”
This sentence can feel heavy — as though it is a new law: you say you love, so prove it. But John’s intent is not to burden us with a performance standard. He is pointing out that genuine love always finds an outlet. It always presses toward something real. If love remains only a feeling, cycling through warmth and then withdrawal, never touching the actual life of another person — it is a tree with roots but no fruit.
Picture a specific scene: you know a brother who is struggling financially. You have the means to help. But the thought surfaces, and another thought quickly covers it — “he probably has other support,” “I need to look after my own family,” “his situation is partly his own fault.” The heart closes. The moment passes.
John isn’t asking us to feel guilty. He is asking us to be honest about that closing — and to ask ourselves: what made my heart shut?
But this is not a new law
Reading this, some people feel a familiar weight settling in. “I can’t do this. I’m too selfish. This kind of love is beyond me.”
That is exactly where John wants us to arrive — but he does not leave us there.
Go back to verse 16’s starting point. John doesn’t say “go and do what Jesus did.” He says “this is how we know what love is” — the knowing is not merely intellectual; it is experiential. I am first a person who has been loved this way. It is from that place — the place of having been loved — that I can begin to love others.
This is the logic of the gospel, not of moral effort: “We love because he first loved us” (1 John 4:19, NIV). The cross is not only a pattern to imitate — it is something that happened to us, an act that loosens the grip of self-protection and indifference. When a person has truly been illuminated by that love, their heart does not need to be forced open. They begin to want to.
So if love feels impossibly hard today, the place to start is not trying harder. It is returning to the One who loved you to the end — and letting that love do something to your closed heart. From there, the action often follows on its own: a message, a meal, a question you actually mean.
Love is not waiting for the feeling to arrive before you act. It is knowing you have been loved at great cost, and choosing — today — to pass something of that on. Not because you have become a more loving person, but because you have been to the source of love, and something in you has shifted.