Pain is not the same as suffering; pleasure is not the same as joy; neither-pleasure-nor-pain is not the same as boredom. Pain and pleasure are physical sensations, which arise automatically from the body’s physical circumstances. But suffering, joy, boredom, and similar things are higher-cognitive states, which often are used to evaluate sensations — whether they are good, bad, neutral, desirable, aversive, etc. Higher-cognitive states like suffering, joy, boredom, etc. can exist in the mind without physical referents. For example, in the first level of jhana meditation, one sees the mind directly and usually feels overwhelming joy; in subsequent levels, the joy becomes more refined/subtle types of happiness and eventually equanimity — all while sitting in sensory deprivation-type environment. People become so accustomed to seeking pleasurable experiences and avoiding painful ones that the evaluative process is mostly unconscious habit. But one can unlearn that habit, and can live experiencing only a “subtle flow of sensations” (Pali: bhaṅgānupassanā ñāṇa), where one feels sensations but is not mentally/emotionally burdened by them.