Eric Greitens is an author, former Governor, and former US Navy SEAL.  He knows more than most the importance of being able to take a hit and keep on going.  In his book, Resilience, he advises, through a series of letters, an old SEAL buddy who is taking the hits life throws at all of us.  

In this quote, Eric speaks about the "symphony" of life and the importance of managing the various things that come our way so as to create beautiful music and not just one long, boring honk.