> What always amazes me is how there’s absolutely no sense of time having passed once I wake up. For me, general anesthesia is probably the closest thing to experiencing death, except with the difference that you get the chance to resume your existence again.

I have been under general anesthesia three times, and this is the thing that sticks with me too: it’s a dress-rehearsal for death. The conclusions you come to by going through it are obvious in retrospect but nonetheless interesting:

You have no conscious experience or memory of the moment when you go under and your consciousness is severed. There is only the lead-up, usually the anesthesiologist saying they’re about to start putting the drugs into your arm, or asking you to count down. The next conscious event in your life is waking up in the recovery room. It’s obvious to say, but you could die while under anesthesia and you would never know. Your conscious life up to the moment you went under would be the same. I think it was Wittgenstein who said that Death is not an event in life, and after experiencing anesthesia I suppose I get what he meant.

> I've never felt as much peace as I do right before going under anesthesia.

Same, but I don’t place a lot of stock in it - like you say, it’s the drugs. I asked my anesthesiologist what he’d be giving me to relax me before I went under and he said fentanyl.