Jesus said, "I tell you the truth. When a man enters the sheep pen, he should use the gate. If he climbs in some other way, then he is a robber. He is trying to steal the sheep.
The man that guards the gate opens the gate for the shepherd. And the sheep listen to the voice of the shepherd. The shepherd calls his own sheep, using their names, and he leads them out.
The worker that is paid to keep the sheep is different from the shepherd. The paid worker does not own the sheep. So when the worker sees a wolf coming, he runs away and leaves the sheep alone. Then the wolf attacks the sheep and scatters them.
"I am the shepherd that cares for the sheep (people). I know my sheep like the Father knows me. And my sheep know me like I know the Father. I give my life for these sheep.
I have other sheep too. They are not in this flock here. I must lead them also. They will listen to my voice. In the future there will be one flock and one shepherd.
No person takes my life away from me. I give my own life freely. I have the right to give my life. And I have the right to get it back again. This is what the Father told me."