The sheep hear his voice, as the shepherd calls his own sheep by name and leads them out. When he has driven out all his own, he walks ahead of them, and the sheep follow him, because they recognize his voice. But they will not follow a stranger; they will run away from him, because they do not recognize the voice of strangers.” Although Jesus used this figure of speech, the Pharisees did not realize what he was trying to tell them. -John 10:3-6