I'm with Robert on this.
Do I love helping people? Sure.
Will what we created exist through time? Perhaps, but we won't know about it, because that version if us didn't create it.
Should we trust Sullivan? We have no reason not to, but do we have to follow the Council and his plan? No.
Do we want to open the book? I think the answer is obvious.
Could they use us to store info? It's one of my theory's. Why else tell us more about the Neithernoor, especially what it can do?
People will still be hurt, some even worse that what is happening now, just because we messed with time.