Verse from John

于是耶稣又说：“我实实在在告诉你们，我就是羊的门。(约翰福音 10:7)

Therefore Jesus said again, “Very truly I tell you, I am the gate for the sheep. (John 10:7)

He places Himself between us and our enemy, the devil, to protect us from spiritual harm.

The closer to the Shepherd, the farther from the wolf.