Sleeper Train by America is a reflective and introspective song that uses the metaphor of a train journey to explore themes of escapism, emotional struggles, and finding solace in dreams. The lyrics ponder over feelings of restlessness and the desire to escape life's burdens, tapping into the universal longing for peace and comfort. Particularly poignant moments in the song include references to the quiet comfort of night travel and the imagery of the train embracing both the darkness and the promise of dawn, symbolizing hope and renewal.