John 10:1-2, 7-10

Verily, verily, I say unto you, He that entereth not by the door into the fold of the sheep, but climbeth up some other way, the same is a thief and a robber. But he that entereth in by the door is the shepherd of the sheep.

Jesus therefore said unto them again, Verily, verily, I say unto you, I am the door of the sheep. All that came before me are thieves and robbers: but the sheep did not hear them. I am the door; by me if any man enter in, he shall be saved, and shall go in and go out, and shall find pasture. The thief cometh not, but that he may steal, and kill, and destroy: I came that they may have life, and may have it abundantly.