Be on guard for the flock

Be on guard for yourselves and for all the flock, among which the Holy Spirit has made you overseers, to shepherd the church of God which He purchased with His own blood. I know that after my departure savage wolves will come in among you, not sparing the flock; and from among your own selves men will arise, speaking perverse things, to draw away the disciples after them. (Acts:20:28-30 [28] Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers, to feed the church of God, which he hath purchased with his own blood. [29] For I know this, that after my departing shall grievous wolves enter in among you, not sparing the flock. [30] Also of your own selves shall men arise, speaking perverse things, to draw away disciples after them.
See All...)

It is important to see that the wolves come from two sources: outside and inside the church. Wolves are always inimical to the well-being of sheep. It is the responsibility of shepherds to make sure the sheep are safe from the wolves. To do this, the wolves must be identified. The way they are identified is through their teachings. Paul described the practice of the wolves: "speaking perverse things." The word "perverse" means "twisted" or "distorted." Their teachings are a distortion of the authoritative teachings of Christ and His apostles. Anyone is a wolf who purposely gives distorted teaching and refuses to repent when shown his error from the Scriptures. The elders must guard the flock against such people.

Notice what happens through the teachings of the wolves: they "draw away the disciples after them." False teachers and prophets have a message that comes from themselves, not from the whole counsel of God. The reason these wolves draw disciples away after themselves is that they are the only source of this teaching. If the church is proclaiming the true terms of the covenant and the whole counsel of God, whatever "perverse" doctrine is being promoted by wolves will not be heard from the faithful pastors and elders. Perverse doctrine cannot be found through valid implications from authoritative Scripture. Therefore, if the wolves succeed in giving some of the sheep an appetite for what they are offering, the sheep will have to follow the wolves to get that appetite fed. Since this is not from God, they are being drawn away from the true sheepfold and into spiritual peril and perhaps damnation.

This is a very serious situation. In John 10 Jesus uses a sheepfold analogy to show that robbers do not go through the true door: "Truly, truly, I say to you, he who does not enter by the door into the fold of the sheep, but climbs up some other way, he is a thief and a robber" (John:10:1Verily, verily, I say unto you, He that entereth not by the door into the sheepfold, but climbeth up some other way, the same is a thief and a robber.
See All...). Jesus is the door of the sheep (John:10:7Then said Jesus unto them again, Verily, verily, I say unto you, I am the door of the sheep.
See All...). Jesus has ascended bodily into heaven. His teachings as given in the New Testament delineate the boundaries of the sheepfold. The elders of the church are responsible to uphold the true words of Christ and His apostles. They are responsible to identify those robbers who will not abide in the teachings of Christ. False teachers refuse to do this job: "He who is a hireling, and not a shepherd, who is not the owner of the sheep, beholds the wolf coming, and leaves the sheep, and flees, and the wolf snatches them, and scatters them. He flees because he is a hireling, and is not concerned about the sheep" (John:10:12But he that is an hireling, and not the shepherd, whose own the sheep are not, seeth the wolf coming, and leaveth the sheep, and fleeth: and the wolf catcheth them, and scattereth the sheep.
See All..., 13).

— Bob DeWaay (Born 1950, Preacher, Bible teacher).