The author is trying to tell us that a lot of things will ultimately fade away but nothing is going to last forever. "The emerald shadows of the ancient canopy." Meaning that, a canopy will eventually break also, it won’t last a long time. "A bell is tolling, fading, fading just like love." Means that love doesn’t last and will soon fade out. Based on what the author wrote I think he is trying to show us that a lot of things in this world won’t last a long time, just like love and the canopy.