When it comes to identifying the Lord's shepherds, the Lord has said "Ye shall know them by their fruits... A good tree cannot bring forth evil fruit." Identifying the Lord's sheep can be more difficult. With so many sheep around--some from one flock and some from another--how can one find a sheep that's simply gone astray, or one that is trying to find his or her way into the Lord's flock?
True sheep know the voice of their Good Shepherd. He speaks to their hearts through his Holy Spirit. Whenever the Lord speaks to our heart, our response reveals the identity of our shepherd.