I don't know if my interpretation is correct, but it gives me the impression that the singer's girl died (not in real life, but in the song), and he's simply watching life go by; with that one symphony reminding him of her, and filling him with that one melancholic feeling. He wants it to end, but at the same time, he desires to have more time. Such contradictory can only leave him to observe, again, as life goes by. As his memories go by...