John 17:15-18

I do not ask You to take them out of the world, but that You keep them and protect them from the evil one. They are not of the world, just as I am not of the world. Sanctify them in the truth [set them apart for Your purposes, make them holy]; Your word is truth. Just as You commissioned and sent Me into the world, I also have commissioned and sent them (believers) into the world.