John 10:3-5, 9

To him the porter openeth; and the sheep hear his voice: and he calleth his own sheep by name, and leadeth them out. And when he putteth forth his own sheep, he goeth before them, and the sheep follow him: for they know his voice. And a stranger will they not follow, but will flee from him: for they know not the voice of strangers.

I am the door: by me if any man enter in, he shall be saved, and shall go in and out, and find pasture.