Passion versus craft

I am reading a very good book about the great dilemma that most of us are confronted with, finding our passion. The author takes a reverse approach, first become really good at something and eventually you will become passionate about that activity that your are mastering. The Book is “So Good they can’t ignore you” by Cal Newport. It has  changed my all whole view on finding my passion. He actually believes that focusing on your passion is actually the wrong approach.  I am enjoyed it very much. Now I am looking at my business and creative life as the process of mastering my craft instead of the constant search for what I am suppose to be passionate about which could be very vague and abstract and therefore hard to pin point.