"To understand passion is to get to the core nature of life, the very purpose of life, which is to progress and to evolve and grow toward fulfillment. If we are progressing and evolving, then we experience joy, energy, vitality and health.  If I am passionate about something it’s because that something brings joy to me, nourishment to me – that activity is a path of evolution and expansion for me- expansion of knowledge, influence, power, and happiness. Pursuit of passion is so basic to life, so intimate to life, that if you’re not pursuing your passions, you’re not going to be happy for long. What you put your attention on grows stronger in your life. You can develop a talent in an area, which allows you to succeed in that area and thus enjoy progress, success and evolution.”  
Dr John Hagelin