Unified in Faith

This Sunday I am preaching on Ephesians 4:1-16. Part of the passage goes like this: "It was he who gave some to be apostles, some to be prophets, some to be evangelists, and some to be pastors and teachers, to prepare God's people for works of service, so that the body of Christ may be built up until we all reach unity in the faith and in the knowledge of the Son of God and become mature, attaining to the whole measure of the fullness of Christ."

I really have been focusing on how the exercise of roles, which are gifts from God, builds up the church, leading people to greater spiritual maturity. Stuck in the middle of this passage, however, is this phrase "unity in the faith" and I am wrestling with what that looks like in reality. When a church is unified in faith what do they do? What do they not do? What do they appear to be?

What do you think? Anyone have a concrete illustration to share?

Jeff