'Door' in the Bible

"In most solemn truth I tell you that the man who does not enter the sheepfold by the door, but climbs over some other way, is a thief and a robber.

But he who enters by the door is the shepherd of the sheep.

To him the porter opens the door, and the sheep hear his voice; and he calls his own sheep by their names and leads them out.

Again therefore Jesus said to them, "In most solemn truth I tell you that I am the Door of the sheep.

I am the Door. If any one enters by me, he will find safety, and will go in and out and find pasture.

But Peter remained standing outside the door, till the disciple who was acquainted with the High Priest came out and induced the portress to let Peter in.