gratitude:

‎"...the more you become a connoisseur of gratitude, the less you are a victim of resentment, depression, and despair. Gratitude will act as an elixir that will gradually dissolve the hard shell of your ego-your need to possess and control- and transform you into a generous being. The sense of gratitude produces true spiritual alchemy, makes us magnanimous-large souled." Sam Keen