Jesus turned, and saw them following, and said to them, "What are you looking for?" They said to him, "Rabbi" (which is to say, being interpreted, Teacher), "where are you staying?"

 So John is saying: "Into this world there comes Jesus, the light of the world; there is a darkness which would seek to eliminate him, to banish him from life, to extinguish him. But there is a power in Jesus that is undefeatable. The darkness can hate him, but it can never get rid of him." As has been truly said: "Not all the darkness in the world can extinguish the littlest flame." The unconquerable light will in the end defeat the hostile dark. John is saying: "Choose your side in the eternal conflict and choose aright." 