Adam Silvera said this quote

I think we’re already dead, dude. Not everyone, just Deckers. The whole Death-Cast thing seems too fantasy to be true. Knowing when our last day is going down so we can live it right? Straight-up fantasy. The first afterlife kicks off when Death-Cast tells us to live out our day knowing it’s our last; that way we’ll take full advantage of it, thinking we’re still alive. Then we enter the next and final afterlife without any regrets