A light's purpose is to shine when and where you need it. It lights up a spot in a room very bright. Unless it has little to no power then it doesn't, it dims. But you can't have it on for a long time or else it dies. Lights make things visible without it, you'll be in complete darkness your world would be invisible. People are like lights, they will be there when you need them, but if you take advantage of their energy they will break off their spirit. You can't turn them on and off when you please, hearts are damaged and insides burn like fire. people don't come with unlimited life guarantees.