In John, chapter 21, when Jesus tells Peter to “feed my sheep,” the New Testament uses different Greek words from Christ which clearly imply the vulnerability of Christians without pastoral leadership and the complete overseeing leadership required of a pastor.
Jesus refers to the sheep as “lambs,” which shows how vulernable and needy we all are without the Chief Shepherd and without an Under-Shepherd. Sheep are particularly defenseless. For example, if a sheep gets over on its back, it sometimes cannot upright itself and will die. I actually knew this to happen on one occasion on the farm where I grew up in Ohio.
The role of the shepherd, according to the Greek words used in John 21, is not simpy to “feed” the sheep, but he is also to “tend” the sheep — to do all that a shepherd does in protecting, guiding, and leading the flock.
It is interesting the role of leadership which Jesus attributed to Peter as a man of God.