All great human deeds both consume and transform their doers. Consider an athlete, a scientist, an artist, or an entrepreneur. In service of their goals, they lay down time, energy and many other choices and pleasures; in return, they become most truly themselves. A false destiny may be spotted by the fact that it consumes without transforming, without giving back the enlarged self.
Cordelia's Honor (ed. Baen Books, 1999) - ISBN: 9780671578282