To give a concrete example of non-theistically coming to “suffering requires attachment,” see Epicurus’ ethics. I don’t know if you would describe the ancient Greeks as untheists, but their view was certainly something other than modern monotheism. Epicurus was an atheist against a pantheon; I presume that monotheists were occasionally killed as ~atheists in that kind of environment.
To give a concrete example of non-theistically coming to “suffering requires attachment,” see Epicurus’ ethics. I don’t know if you would describe the ancient Greeks as untheists, but their view was certainly something other than modern monotheism. Epicurus was an atheist against a pantheon; I presume that monotheists were occasionally killed as ~atheists in that kind of environment.