Interesting reading. There are three types of people in the world, those who have no passion at all (yet are still content), those with a passion for one thing, and those passionate about everything.
People with a passion for one thing are those who have found some calling in life and live and breathe that calling. These people may have multiple “one things” for which they are passionate about but they are interested primarily in the thing itself. These are the people who have dreams about thier passion, who spend idle moments of their day thinking about it and who possess a sense of manifest destiny and purpose once they discover their calling.