W hat is the essence of a good life? Aristotle tells us that it is ''to serve others and to do good.'' In this issue of The Art of Health Promotion, Dr Stephen Post supports his bold recommendation for a universal prescription to do just that with a comprehensive review of the literature on the benefits of volunteering. His G2BG Rx of 100 hours, a year of volunteer work, is indeed a win-win-as volunteering is a version of paying it forward that pays dividends back. 1 Dr Post asserts that no other behavioral intervention is as beneficial. Although we may not yet be able to definitively draw that conclusion, it certainly appears that volunteering-beyond contributing directly to community well-being-directly boosts well-being in numerous other domains. These findings support Gallup's assertion that the domains of well-being are interdependent and reinforce one another. 2 Dr Post's review clearly highlights a myriad of benefits to physical and emotional well-being for individuals of all ages. The review also cites the heightened sense of purpose experienced by cardiac patients who volunteer. Fortunately, that effect is much more universal. Volunteering is routinely credited for enhancing one's sense of purpose and meaning. 1,3 Perhaps that's in part because it can also contribute to career well-being 3 by facilitating the exploration of new fields, the development of new skills, the accumulation of experience, 1,3 improvement in communication skills, and increased cultural sensitivity. 4 Volunteering makes it easier to build a network of contacts or find a job 1,3 and can help develop leadership skills. 4 So numerous are the benefits that some employers are finding that offering opportunities to volunteer provides a business edge by increasing employee retention. 4 There are also numerous ways in which volunteering can enhance social well-being-it provides opportunities to meet new people, establish friendships, be a role model for others, and obtain more social support. 1,3 Volunteers report better social networks, enhanced feelings of belonging, 5 and better family functioning. 1 Horoszowski 5 emphasizes that volunteering increases empathy, which can enhance life satisfaction. Barbara Fredrickson's broaden and build theory of positive emotions and its extension, the Upward Spiral Model of LifeStyle Change, 6 may also provide a partial explanation for the reasons volunteering is so beneficial. It turns out that giving time actually increases one's perception of having time (or ''time affluence'') 7-in part because by giving, people feel more confident, useful, and capable-which leads them to believe they can accomplish more in the future. These findings are very consistent with the notion that the relationship between positive emotions and psychological resources is in fact reciprocal, creating an upward spiral dynamic that may well increase the overall propensity for a host of other positive behaviors in addition to increasing the likelihood of continuing to volunteer. Fredrickson 6 saw similar effects for loving-k...