There is a famous line in Genesis 4. It says, “Am I my brothers keeper?” The line comes after Cain brutally murders his brother Abel. God asks, “Where is your brother?” The only way Cain can think of answering is by “minding his own business,” and pointing the finger at the brother he just killed.
Most of us are familiar with this section of scripture and this verse in particular. What we’re not familiar with is how to handle it. It’s easy to take the side of Cain. In a culture of hyper-individualism we shake our heads in agreement that we are not our brothers keeper. We think to ourselves, “their business is their business. I don’t need to worry about what they’re doing or not doing.” And when we do poke into someone’s business, we’re often told, “mind your own business!” Maybe there are scenarios where we ought to mind our own business, but more times than not we’re simply abdicating a responsibility that is ours to keep. We are our brother’s (and sister’s) keeper.
The church is the family of God (Mark 3:31-35). This means that if we are a Christian, our brothers and sisters are not only those who are related to us by blood, but are also those related to us by the blood of Christ spilled on the cross. To be a member of this family means that we care for one another. It means that we are in one another’s business–not for the sake of gossip, slander, shame, ridicule, or scorn– but for the sake of building up. It means that we care whether or not our brothers and sisters are representing Christ in their day to day lives.
Jonathan Leeman, in writing about church membership, puts it like this: “Church membership is not about additional requirements. It’s about a church taking specific responsibility for a Christian, and a Christian for a church."*
“Church membership is not about additional requirements. It’s about a church taking specific responsibility for a Christian, and a Christian for a church."
The gospel of Jesus frees us to love one another in ways that we would not have previously. It frees us to celebrate with our brothers and sisters in their victories, and weep with them in their failures. It frees us to ask questions, and to have questions asked of ourselves. The church is to be a family like none other on this earth. It is God’s grace that we get to care for one another in such a way that doesn’t promote our individualism, but exemplifies his kingdom instead.
*Quoted from Leeman's book: Church Discipline.