One of the strongest signs of being in the zone is a sense of freedom and of authenticity. When we are doing something that we love and are naturally good at, we are much more likely to feel centered in our true sense of self - to be who we feel we truly are. When we are in our Element, we feel we are doing what we are meant to be doing and being who we're meant to be.
The Element: How Finding Your Passion Changes Everything (ed. Penguin, 2009) - ISBN: 9781440656187