If one reads the NT carefully you will find that the NT churches are much like churches today. They are filled with people...people who like us... are not complete. The disciples of the NT were unfinished. They were people in progress involved in a dynamic relationship with Jesus as Lord. As you read the Epistles you find churches dealing with the sins of her members, congregations suffering from periods of discontent and churches dealing with doctrinal questions.
Every one of the NT books have one continuing theme - keep your eye on Jesus. The inspired authors of these books, guided by God's Spirit, sought to return the focus of the members back to the Lord. If we stay focused on people, their view points and their weaknesses we will be easily discouraged. People have "all sinned" (Rom. 3:23) and if anyone claims to have no sin they are a liar (1 John 1:8,10). So the writers of the Epistles just kept tuning us back the the Lord, the Father and the Spirit.
Looking for a church without stain is like looking for a person without sin and will finally push a person to church after church bent on a path of ultimate discouragement. Keeping our eyes on the Lord and remembering we are not perfect either is the best course. Obviously we all have to keep trying, communicating...letting iron sharpen iron...so that we will grow and become more like Christ. What if Christ gave up on us? Give the church a little grace, after all Christ has given us that......hasn't he? Foree