There are nearly an infinite number of interests & endeavors that may lead to material success, but the underlying patterns of behavior that nourish the human spirit, & the ways in which happy & healthy people relate to one another, are much more limited. Like Yin & Yang men & women tend to fit each other & have certain roles for which they are wired. People who regect this (potentially because of unaddressed abuse or trauma) often have a much more difficult time finding happiness & fulfillment.