The good life is a philosophical term for the life that one would like to live. It is often associated with Aristotle and his teachings on ethics, specifically on eudaimonia (literally, “good spirit”).
In his book Authentic Happiness, psychologist Martin Seligman, a pioneering researcher in the field of positive psychology, defines the good life this way:
Using your signature strengths every day in the main realms of your life to bring about abundant gratification and authentic happiness.
He also provides definitions for the pleasant life, the meaningful life, and the full life:
The pleasant life, I suggested, is wrapped up in the successful pursuit of the positive feelings, supplemented by the skills of amplifying those emotions. The good life, in contrast, is not about maximizing positive emotion, but is a life wrapped up in successfully using your signature strengths to obtain abundant and authentic gratification. The meaningful life has one additional feature: using your signature strengths in the service of something larger than you are. To live all three lives is to live a full life.
Book Excerpts
Gift From the Sea, by Anne Morrow-Lindbergh