Your cave analogy is apt and terrifying. We went into Luray Caverns once while on vacation. They did that 'turn the lights off and wait for the reactions' thing. In seconds the nervous laughter turned to moans, cries of concern and soon enough, wails of fear. Just before the cacophony became unbearable, the cheshire-cat grinning guide turned the lights back on...ain't never going back there again either...albeit the visual memories will stay with me for my life. I can imagine that hell has that effect on the heart and mind. In a cave, they say a person goes insane without light in short order. In hell that won't be an out or an option.Yes, the other example that stays with me is imagine being lost in a cave, isolated with no other person to call out to. Your just submerged in total pitch darkness. That would be terrifying. Now take that and intensify that to a million with fire and never ending pain. Yikes. Thank God He has saved us from that place.
Heh, I can talk all day about rock climbing. Dry, open air ascents. Multi-pitch to a lesser degree, but top-rope to a great degree and in boring, mind-numbing detail. Caving on the other hand, all I can say is that once I couldn't clearly see my hand in front of my face, I nope-nope-NOPED my way out to the entrance as quickly as my feets would take me. I ain't never looking back and with zero humiliation or regrets.