Alan W. Watts said this quote

What’s it gonna be like, dying? To go to sleep and never, never, never wake up.Well, a lot of things it’s not gonna be like. It’s not going to be like being buried alive. It’s not going to be like being in the darkness forever.I tell you what — it’s going to be as if you never had existed at all. Not only you, but everything else as well. That just there was never anything, there’s no one to regret it — and there’s no problem. Well, think about that for a while — it’s kind of a weird feeling when you really think about it, when you really imagine.[The Book: On the Taboo Against Knowing Who You Are ]