John 17:14

While I was with them in the world, I kept them in thy name: those that thou gavest me I have kept, and none of them is lost, but the son of perdition; that the scripture might be fulfilled.

And now come I to thee; and these things I speak in the world, that they might have my joy fulfilled in themselves.

I pray not that thou shouldest take them out of the world, but that thou shouldest keep them from the evil.

They are not of the world, even as I am not of the world.