I don’t believe in God or hell, but if I’m wrong and there is some loving or just diety out there, he or she wouldn’t be so immoral to dole out such a punishment unless the person was truly evil and caused a lot of harm and devastation (for example, serial killers or child molesters).
I think that approaching this fear from a logical and rational perspective could do a lot to alleviate some of that fear and worry.
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“The darkness shall be the light, and the stillness the dancing.”
— from Four Quartets by T.S. Eliot