I've been told numerous times it's not wise to marry a woman outside a church denomination. I'm still trying to find that one in the Bible.
Most followers of Christ agree that their is one body. Most of the times, we don't act that way. We get around it by speaking our Christianese langauge. "There's one church, but we're just one body of it." "We need to fellowship with those who believe the same doctrine as us." We take pride in our denominations. We take pride in our non-denominations. We forget the fact that Christ built one church, and there is one body, and there is one faith. There's one head to this body, and that is Christ alone.
"...and on this rock, I will build my church" ~ Matthew 16:18
"There is one body and one Spirit, just as you were called to one hope when you were called; one Lord, one faith, one baptism; one God and Father of all, who is over all and through all and in all. " ~Ephesians 4:3-6
I've found great joy in living out my faith and experiencing God with fellow believers outside the bubble I was raised in. If you haven't already, I encourage you to step outside your silly man-made walls, and see what God has to offer. Let's be the church Christ called us to be.