some people find that passage very cynical and negative, I have always found it very true, and thus comforting. Not to take anything too seriously, enjoy what you have, but let it go when it's time is over.
There is so very much in life that is good, but it is all fleeting. I am learning (not willingly) to eat what's on my plate, enjoy it, but not expect it to last, and not spend TOO much time mourning it...lest I miss the next invitation to the party of life.