You remember something about the Grail's knights. The Knight of the Swan was one of them. They live here in the temple, except when they are sent away on some journey, to help some one who is in trouble, to do some act of justice, to fight for the right, or to punish the wrong. And whether they stay here or go as far away as they can, they never need any food except what the Grail gives them. The Grail chooses them at first, feeds them afterwards, and gives them their commands, for sometimes, in that halo that shines around it, there appear letters and words to tell the knights what they should know.