The importance of your relationships, especially those close family ones, to your health and longevity cannot be overstated. We all know of people (or we may have observed this in our own lives) who, when in love have performed better, be it at school, in their careers, or health wise. Conversely, stories abound of men and women (men especially), who succumbed soon after their spouses died, even when there was no prior illness (before the decease of the spouse.
Mastering your relationships is all important, because they affect every aspect of your life. This is why we have devoted an entire section to it.