If you look at spirituality as energy flows, we are either consumers or producers of energy. Production requires inputs. We can use inputs from other people and produce something with that, or we can use inputs from other sources. Novelty is instantly energizing. Introduce new material into a situation and people’s recognition and anticipation immediately spike. Rehashing old material can lead to novelty, but if it doesn’t the result is usually depression: people feel worse than they did before the rehash, because energy was expended without producing anything new.
People who produce more than they consume are in the minority. Producers who obtain inputs from sources outside the circles they provide products to are rare. Most producers obtain their inputs from the same people they provide products to. Without external inputs, a system is closed and cannot exceed a zero-sum state. In practice, closed systems always degrade and eventually degenerate.
God is the ultimate outside source of input. Borrowing and trading energy between ourselves can be sustained temporarily by exploiting the energy of people outside our circle of interest. Our circle benefits from the loss experienced by the people we exploit. However, humanity as a whole represents a single system. If none of us obtain inputs from outside that system, it is a closed system, subject to the same degeneration as any other closed system.