I commented that it didn't even matter to me if I agreed with him--I'm just so thrilled when Christians refuse to toe the party line and think in lockstep. I realized afterwards that it might have seemed like I am against Christian unity. Like I enjoy a good fight. But that's not entirely true. I'm all for unity in the Spirit, but against conformity to the Christian subculture. There's a huge difference.
A number of home schoolers replied to Piper's post. Now there are few people I admire as much as home schoolers. I'm just remembering back to Chelsea's elementary school years, and the joys we had trying to get her to do her homework. Chelsea used to be very strong willed, and even though she has always had the gift of gab, she lived by the old adage that volume trumps logic and reason. But she has turned out to be the most wonderful eighteen-year-old, so that's one of the reasons I know there's a God. Anyway, I developed a deep and lasting reverence for home schoolers during those years.
But I question the notion that protecting children from "the world" keeps them from sin. We are the world! (Isn't that a song?) What I mean is that we are not necessarily any better than unbelievers. As anyone who has spent time in the subculture will attest to, we can sin with the best of them, we just Christianize it. When it comes to gossip, anything goes as long as we start out with, "So-and-so really needs our prayers," and end it with, "Bless her heart!"
I don't mean to sound cynical--I know many amazing Christians. But they are amazing only because they walk with the Holy Spirit, not because they shelter themselves from people who think differently. They have learned not to conform to the world (or the Christian subculture), but to be transformed by the renewing of their minds. (Romans 12:2) How do we renew our minds? By having the mind of Christ. (1 Cor. 2:16)
The only thing that keeps us from conforming to the world is having the mind of Christ, through the Holy Spirit. Without it, we will conform to something worldly, either popular culture or the Christian subculture or both. But when the Holy Spirit transforms us, there will be unity between believers. Why? Because the Spirit is not divided against himself. Where he governs, Christians are of one mind.
But we are to look to Christ, not to other Christians. They may be wrong, and even if they're not, why should we settle for secondhand grace? If we focus on other Christians, we will at best conform. But if we look to Christ, he will unite us through his Spirit with other like-minded believers.