Life is rarely flat if you really pay attention to it. Most of it filled with up up up, and an equal of down down down. Often times, the ups and down is tuned to whatever we're listening. And what we listen reflects our deepest feeling and mood. Some called this state manic, I prefer to call this my flow moments. Flow like a river, ever changing.
Life does not always need to be flat. Open your Liked Songs and play it randomly. Follow the songs, each and every of it. Be sad, be happy, be free.