I got sick and tired of a joyless existence, and so have thought a lot in the past few years about how to bring more joy into my life. The more I think about it, the more I believe that joy and gratitude are inseparable. Joy is defined in the dictionary as an "emotion evoked by well-being, success, or good fortune or by the prospect of possessing what one desires," while gratitude is that "state of being appreciative of benefits received." In other words, whenever we are appreciative, we are filled with a sense of well-being and swept up by the feeling of joy.
M. J. Ryan (2017). “Attitudes of Gratitude: How to Give and Receive Joy Every Day of Your Life”, p.14, Conari Press