'Door' in the Bible

“I assure you: Anyone who doesn’t enter the sheep pen by the door but climbs in some other way, is a thief and a robber.

The one who enters by the door is the shepherd of the sheep.

So Jesus said again, “I assure you: I am the door of the sheep.

I am the door. If anyone enters by Me, he will be saved and will come in and go out and find pasture.

But Peter remained standing outside by the door. So the other disciple, the one known to the high priest, went out and spoke to the girl who was the doorkeeper and brought Peter in.