The survival of wilderness -- of places that we do not change, where we allow the existence of creatures we perceive as dangerous -- is necessary. Our sanity probably requires it. These places function, whether we intend them to or not, as sacred groves -- places we respect and leave alone, not because we understand well what goes on there, but because we do not.
Light gives of itself freely, filling all available space. It does not seek anything in return; it asks not whether you are friend or foe. It gives of itself and is not thereby diminished.