The lyrics for "Duty" are entirely instrumental, offering no explicit narrative or emotional cues.
Without any lyrical content, it's impossible to determine a specific meaning or analyze the craft behind the music. The absence of words leaves the interpretation entirely open to the listener's subjective experience.
Therefore, any perceived meaning or emotional impact is solely a product of the instrumental arrangement and the listener's personal context. The music itself becomes the sole carrier of potential meaning, unguided by lyrical direction.