Sacrifice
At the end, those who choose the shadows, do it so that their people can live normal lives. It is injustice that someone should sacrifice for others to have a happy life but just think for one moment, if you had to give up all so that those you love will smile, what will you do? The pain will remind you that you prevented the one you love from it. Now isn't that worth all of it. If you had to do it for a lifetime and over and over again, you would.