John 10:4-8

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.

This parable spake Jesus unto them: but they understood not what things they were which he spake unto them.

Then said Jesus unto them again, Verily, verily, I say unto you, I am the door of the sheep.

All that ever came before me are thieves and robbers: but the sheep did not hear them.