Some have said that imitation is the greatest form of flattery. But this is not always true. What is true is that imitation is always imitation. This exhortation is always necessary and urgent for the christian, because it remains a very serious threat to the health of the church. The Word of God is essential to the salvation, life and vitality of the church, and through the church to the individual believer. How shall we know the wolves who prey upon the sheep? The most cunning imposter, who looks like the real thing, can always be detected when he is carefully scrutinized. Today, we will study Paul's warning to the Ephesian Elders in Acts 20:28-31 to watch out for the wolves within.