There they had killed a lamb and were eating it. The other sheep just stood around watching them. They didn't know the danger. We are stupid to think that we can save ourselves. Sheep need the protection of the shepherd.
Sheep have no claws, no sharp teeth, no terrible horns.
They can't climb trees or squirt mace like a skunk. There is no mighty roar to frighten their enemies and no armored plate. They can't fly away. You can't save yourself. You're dependant on Jesus.