Jesus also told Peter that God revealed to him Jesus' true identity before the other apostles knew it. After Jesus' resurrection, before Jesus ascended back into heaven, Jesus told Peter to feed his sheep. In Peter's instructions to fellow elders, there is an enormous amount of insight into the kind of man who should serve as a shepherd. Second, notice that he appeals to them on the basis of example. Stated in words more familiar to us, take care of the Christians in your congregation.
Sheep are hard to care for.
Sheep need taking care of, and that is the basic job of the shepherd. I do not believe that it is coincidence or accident that Christians as a congregation, as the church are referred to as a flock of sheep. The devil as a roaring lion is prowling around looking for victims to eat. There are wolves that love to rip a flock apart. We can hurt ourselves in a thousand ways.