鉕鉕鉕鉕鉕鉕鉕鉕鉕 (Promethium)

The song's lyrics borrow from Plato's Allegory of the Cave, but incorporate its own context and interpretation, describing how, in a society where knowledge has become widespread, people have become arrogant and conceited. Has education and learning truly freed us from ignorance, or has it merely allowed our true selves to increasingly polarize? The lyrics also allude to the myth of Prometheus stealing fire, echoing the fire in the Allegory of the Cave. The narrator ultimately questions Prometheus: did the fire truly bring light, knowledge, and progress, or did it bring opposition, conflict, and division?
The 鉕 (Promethium) in the title is an element named after Prometheus.