Israel marched on the little city of Ai expecting an easy win. Instead thirty six men died and the army ran (Joshua 7:5). Joshua tore his clothes and cried out to God, and the answer he got was startling: "Israel has sinned" (Joshua 7:11).
Israel. The whole nation. Yet the actual culprit was one man, Achan, who had quietly hidden some plunder that belonged to God (Joshua 7:21). One man's secret, and an entire army lost the battle.
There Are No Isolated Parts
Paul talks about the church as a body, and he means it quite physically (1 Corinthians 12). Your liver doesn't get to say an infection in your lung isn't its problem. Whatever happens in one part ends up touching all of it, whether the rest likes it or not.
That's behind Paul's serious warning about the Lord's Supper. We aren't meant to come to the table as isolated individuals with private religion. He says that eating and drinking "without discerning the body" brings judgment (1 Corinthians 11:29). What I do privately has weight for everyone around me.
Standing Together
Jesus put it plainly: "Every house divided against itself will not stand" (Matthew 12:25). Think of a scattered army against a united one. Unity isn't a nice bonus for the church. It's how spiritual strength works at all, and a hidden compromise in one tent weakens the whole camp.
What This Does to My Private Life
This story quietly changed how I think about my "private" choices. I'd gotten used to treating sin as strictly my business, between me and God. In one sense it is. But Achan's story pushes against the idea that what I tolerate in secret stays put.
That's sobering. It's also, oddly, an invitation to belong. I'm not an island working out my salvation alone. I'm part of a body, dependent on the people next to me and responsible to them. Achan's hidden sin cost thirty six lives. Mine might cost something too, even if I never see the connection.
Better to walk in the light now than to find out the hard way.