I think the song isn't lamenting over how you're ready to accept your loved ones' deaths. Rather, I think it addresses the fact that we can't control our own death and when it happens, and that it is inevitable to all of us. I think it's a song about realizing your own death and being comfortable with the fact that death is imminent and can happen at any age and place. It sounds as if the singer has done all he has in life, and is ready to face death whenever it chooses to appear. It has a joyous approach to death somewhat, as if death is the process of being liberated. Also, the song brings up points about family members when he mentions the "dead leaves" and the "tree." think of it as a family tree, where our own dead relatives may be dead, but their hearts live on in the rest of the family, just as the dead leaves are alone as they have fallen down from the proverbial "family tree."