[ this is a lot of science talk, but he dumbs it down enough for morgana to grasp the concept. the light is actually a fire? somehow that seems fitting for her beliefs, even in this place. ]

In other words, it's like gazing into the past. ...The idea isn't lost on me. Perhaps, in that way, I've been observing the skies for a long, long time now...

Your grandmother was a scholar, then?