“Truly, truly I say to you, the one who does not enter through the door into the fold of the sheep, but climbs up at some other place—that one is a thief and a robber. But the one who enters through the door is the shepherd of the sheep. For this one the doorkeeper opens, and the sheep hear his voice, and he calls his own sheep by name and leads them out. Whenever he sends out all his own, he goes before them, and the sheep follow him because they know his voice. And they will never follow a stranger, but will flee from him, because they do not know the voice of strangers.”