Certainty

I was rereading this passage for class today (in my book it's on page 115), the one that talks about the end of the universe. I was thinking about Billy's question that if the Tralfamadorians knew what was going to happen, why wouldn't they do something to stop it? And then  I read the response he was given, that it always had happened that way, always would happen that way, that they always had let it happen that way, and they always would let it happen that way. " The moment is structured that way." (115)
I think I just really liked the idea that they were so certain that that was what was going to happen and that it was supposed to happen, so why would they change it? It kind of made me think of the way I worry about so many things that are happening in my life and it takes up so much of my time, but what is the point to all of that? There is no point in my trying to change something that hasn't yet happened because, unlike the Tralfamadorians, I don't know what is going to happen. I guess the passage just really struck me. I don't know.