Christ is a person and at the same time an environment. That is why we said you are in the world and not of the world because “If any man be in Christ is a new creature” 2 Cor. 5:17. That “in” connotes an environment, a place or a presence that you relocate to. So though we are in the world through the atmosphere of Christ but not of the world. Just as when you are in your mother’s womb, yes you are alive to the world, living but yet you aren’t aware of the physical activities/realities of the world but yet you are in the world. Your mother’s womb is an environment, another place entirely different from the reality of the world.