On March 4, 2014, the author of a blog I follow had an interesting perspective on what he has learned from sunsets. See post http://www.weblessyourheart.com/2014/03/10/sunsets-gift-volume-1-of-10/
“Realize that there is a certain duality to life. A sun that must always make way for the night. The lows make way for the highs. That plants feed on the light, but grow in the dark. That music needs the silence.”
I like to think of this as the ebb and flow, yin and yang or breathing. One movement allows the next, all in perfect time and rhythm.