In my opinion, this piece by Chopin captures life's bittersweet reality better than any other song. Watching this visual video is a helpful reminder that there are highs and lows constantly playing together in the symphony of time. At any given moment, on any given day, we can point to something good but also point to something difficult.
I believe theologian John Piper said something to the effect that there is no unadulterated joy in this life, yet there is no sorrow so deep that light cannot break through it. I think Chopin decided to say it without using words: