John 10: 1 - 10
1 "Truly, truly, I say to you, he who does not enter the sheepfold by the door but climbs in by another way, that man is a thief and a robber;
2 but he who enters by the door is the shepherd of the sheep.
3 To him the gatekeeper opens; the sheep hear his voice, and he calls his own sheep by name and leads them out.
4 When he has brought out all his own, he goes before them, and the sheep follow him, for they know his voice.
5 A stranger they will not follow, but they will flee from him, for they do not know the voice of strangers."
6 This figure Jesus used with them, but they did not understand what he was saying to them.
7 So Jesus again said to them, "Truly, truly, I say to you, I am the door of the sheep.
8 All who came before me are thieves and robbers; but the sheep did not heed them.
9 I am the door; if any one enters by me, he will be saved, and will go in and out and find pasture.
10 The thief comes only to steal and kill and destroy; I came that they may have life, and have it abundantly.

EWTN