Why does God appoint men to be pastors and elders in churches? What's an elder, how many should each church have, and how do they relate to pastors?

Here's our conviction: Every pastor is an elder, and every elder pastors the church, each according to their own giftedness and responsibility. To shepherd His people, God appoints pastors and elders to oversee the church, guard the church, and teach the church. Why? Because churches need to be overseen, guarded, and taught as they're built up in the fullness of Christ.