Sheep need a shepherd. The most natural thing is for a sheep to go astray. He needs a shepherd to lead him. Sheep need to be led to food and water. Sheep need a shepherd for provision.
Sheep are helpless prey to the wolves.
Sheep need a shepherd for protection. A pastor is a shepherd. We are the sheep of His pasture. Sheep need a shepherd. People ought to join a local church so they can have a spiritual shepherd as God taught.