Souls power the lights in HeavenAnyone - WHY would God want or need trillions of souls if indeed there is an afterlife? What's the point of keeping "saved souls" for all eternity? What would He need them for?
But in all seriousness that is kind of like saying why would people want to get together with loved ones on the holidays? People generally do what they can to spend as much time with loved ones as they can. Now if you had an opportunity to reunite all you loved ones and be with them wouldn't that be a good thing? Souls are not some abstract thing, they are the life-forces of individuals. He is not keeping them so much as allowing them and loved ones to live with him for eternity which is exactly where we want to be