23 March 2025

The world’s light.

Mark 4.21, Matthew 5.14-16, Luke 8.16, 11.33, John 8.12.

In the Sermon on the Mount, Jesus tells his students they’re the light of the world. And multiple times in John, Jesus himself is declared the light of the world. Here, I’ve got one of those passages lined up for you.

Matthew 5.14 KWL
“You’re the world’s light.
A city can’t be hidden when it lies on a hill.”
John 8.12 KWL
So Jesus spoke again, saying, “I’m the world’s light.
My followers should never walk in the dark,
but will have light and life.”

So which is it? Both, obviously.

It’s not a contradiction. Jesus is the true light who entered the world; Jn 1.9 as long as he’s in the world he enlightens it; Jn 9.5 whoever believes in him needn’t live in the dark; Jn 12.46 he reflects the fact that God is light. 1Jn 1.5 And we’re the light of the world when we follow his example, and reveal to the world God’s kingdom is near, same as Jesus did. Once we were darkness, but now light, Ep 5.8 for since God’s now our Father, we are light’s children, 1Th 5.5 shining as lights in this dark world. Pp 2.15

Yep, this light metaphor is all over the bible. Wouldn’t hurt us to read up on it, and see all the different ways God wants us to carry his light. 2Co 4.6

Starting with the city-on-a-hill idea. Nowadays we don’t create cities on hills. When developers create a town, they place them somewhere convenient: Outside bigger cities, near main roads, a place easy to access. Hills aren’t so easy, plus there’s all the hassle of building on a hill. Put a city on a hill, and it’ll nearly always be an expensive city. But back in ancient times, rulers worried about invasion, and figured a hill was easier to defend than a plain. Plus they could see their enemies coming. The downside was their cities were very visible-especially at night, with all their torches burning.

That’s the trait Jesus wants his followers to have: We oughta be nice and obvious. (True, it makes us more visible to enemies, but let’s not hang up on the negative.) If Christianity is a city on a hill, we Christians need to be visible. No hiding our faith. No concealing who it is we follow.

You don’t put it under a basket.

Much as Christians might knock ’em nowadays, Pharisees never concealed who it was they were following. God ordered the ancient Hebrews to put fringes and blue cords on their clothes, Nu 15.38 so Pharisees made sure their fringes were extra large Mt 23.5 and extra visible. God ordered the Hebrews to not grow beards without sideburns, Lv 19.27 so Pharisees simply didn’t shave their beards, even though Greco-Roman custom (which, contrary to Jesus movies, Sadducees tended to follow) was to be clean-shaven. Pharisees deliberately stood out. They looked like Pharisees. Didn’t always act as Pharisees should, which is another issue, but there was no hiding they were Pharisees.

Christians don’t always dress in a distinctively Christian way. Conservative Christians might dress conservatively, but anyone can do that; for all we can tell they might be Hindu, Muslim, Jewish, or Mormon. Even pagans can be conservative. To stand out as Christians by our appearance, we have to wear something overtly Christian, like a Christian T-shirt, minister’s robes, or a habit. But Jesus doesn’t expect our light to shine by our clothing. Clothes are the façade. It’s what’s under the outward appearance that counts. Are we producing good fruit? That should reveal our Christianity.

If you look atop a hill in the daytime and see no city there, it doesn’t mean the city’s invisible, or is hiding its light really well. It means there’s no city there at all. And the same is true of Christians. If you look at a person and see no light, it makes it plain they’re not Christian. Oh, they may be trying to look Christian, and have convinced themselves that’s what they are. They have the trappings. They can fool superficial people. But light will tell you if there’s anything really there. No fruit? No light. No Christian.

It’s been argued, and Christians have taught, that whenever one an ancient hill cities wanted to hide from their foes, they could just douse all their torches and oil lamps. Or put something over them, like a basket.

And of course they could. But ancient armies didn’t scout their targets in the dark. They’d check you out in the daytime, and learn exactly where you were. They might move into position and attack in the dark, and you could try to make it difficult for them by putting out your lights. Wouldn’t do any good. You can’t hide a hill city. Putting your lamp under a basket was ultimately a waste of time… and would set your basket on fire.

Now, if you intended to hide an open flame, you used a jar, Jg 7.16 not a basket. The ancients weren’t that stupid about fire safety. That’s largely why Jesus said you don’t put a lamp under a basket. Or under the couch, which was just as flammable.

Mark 4.21 KWL
Jesus told them, “Does the light come in
so it might be put under a basket or under the couch?
Not so it can be put on the lampstand?”
Matthew 5.15 KWL
“Nor do they light a lamp and put it under a basket,
but on the lampstand,
and it shines on everything in the house.”
Luke 8.16 KWL
“Nobody who grabs a light covers it with a jar,
nor puts it under the couch,
but puts it on a lampstand
so those who enter can see the light.”
Luke 11.33 KWL
“Nobody who grabs a light puts a cover on it,
{nor under a basket,}
but on the lampstand
so those who enter can see the light.”

The KJV translates μόδιον/módion as “bushel,” which is why the “This Little Light of Mine” song goes, “Hide it under a bushel?—No! I’m gonna let it shine…” A módion (the object-tense form of μόδιος/módios) is a basket which held a modius, a sixth of a medimnus, and since you don’t know what either of those measurements mean, I’ll just say a módios was the size of a small wastebasket.

Lamps in Jesus’s day were basically small dishes of olive oil with a wick in it. They had a handle so you could hold it without burning your hand. Often there’d be a separate hole to put the wick through. It lit the room as much as a candle, so lampstands would hold multiple lamps. Like Jesus said, you don’t light a lamp, or bring it into a room, just to put it where it does no good. You stick it on the lampstand. Same with us Christians. You don’t go to all the trouble of learning to be light, like Jesus is light, like God is light… then conceal it, and pretend to be dark. The Christian lifestyle isn’t purely academic or ideal. It’s practiced.

Unfortunately there are such people as dark Christians. They fixate on sin, fight the things they fear, and do little to nothing to develop the Spirit’s fruit. As a result they draw no one to God. Cause no one to praise our heavenly Father. On the contrary: Pagans and Christians alike groan when they see them. Their rotten attitudes, fearful outrage, and unkind behavior give Christianity and Christ a bad name. We gotta compensate for them regularly. We gotta be the sort of light Jesus calls us to be. By letting our authentic good works shine forth.

Shine your light… but don’t act in public. Wait, what?

Wanna freak out your fellow Christians? Quote these verses together, then watch ’em go bonkers over the contradiction.

Matthew 5.16 KWL
“So shine your light before the people
so they could see your good works,
and think well of your heavenly Father.”
Matthew 6.1 KWL
“Watch out to not do your righteous acts before the people
to be seen by them.
Otherwise you won’t earn wages from your heavenly Father.”

Do your good works in front of people… but don’t do your righteous acts in front of people? Wait, which instruction does Jesus want us to follow?

Both. The difference between the instructions has to do with motive—as is made clear by where we find these verses. Jesus taught about being the world’s light right after he talked about being the earth’s salt. We’re to enhance the world; lighting it up is another way we do that. Whereas when he taught about not doing righteous stuff in front of others, he followed up by critiquing hypocrites who want public praise for their deeds, who aren’t actually doing any of these deeds for the Father. If you’re doing ’em for God, good!—shine your light. If you’re doing ’em for praise, bad Christian!—human praise is all the award you’ll get.

Out of context, it looks like Jesus is being inconsistent. That’s why I keep reminding you context matters.

Still, we get Christians who read Matthew 6.1 and figures this gives ’em license to ignore Matthew 5.16. Their Christianity, they insist, is private. Personal. Between them and Jesus. They don’t put anything on display. They hide their good works. Their devotions are secret. That’s their excuse, anyway.

But among those Christians whose religion is “private,” do they otherwise reveal good fruit? Are they kind, patient, gracious, compassionate, empathetic? If not, it tips you off their religion isn’t private; it’s non-existent. These are the people, when they tell people they’re Christian, regularly get the response, “You’re Christian?” None of the clues were there. They don’t act like Jesus; they’re as pagan as anyone.

True Christians might keep our acts of devotion personal. But when we truly follow Jesus, people are usually gonna figure us out. They may not recognize we’re Christian; they’ll deduce we have some kind of religion. (This is why when we preach the gospel “without words,” we gotta also use words!) They’ll recognize there’s something religious or moral about our character. They’ll notice we’re not jerks; that we’re self-controlled, thoughtful, peaceable, helpful. That we’re generous instead of self-seeking. That we love people instead of fear everybody. That we’re joyful, not angry. They’ll want to know what meds we’re taking! But really it’s because they see our light.

When we’re doing it wrong, they’ll see nothing. When we’re doing it right, it’ll point to Jesus. ’Cause it’s his light.