What Kevin Costner only begins to do, those of us in ministry do every day. In fact, Jesus spoke on more than one occasion about wolves. He was not selling books or making movies. He just describes the realities of ministry. Matthew 7 records Jesus' warning about false prophets who disguise themselves as sheep.
Ferocious wolves appear to all the world as innocent sheep.
Paul warns that his absence will motivate savage wolves to launch attacks on the flock. I've often wondered how a film maker would capture a shepherd scene. A warm spring sun watches a pleasant meadow full of flowers and a crackling brook chasing merrily on its way. The little flock is peaceful today, grazing on lush grass serenaded by field larks whose songs fill the dry cool air with melody. Truly, the shepherd has led the flock to green pastures and cool waters.