The great work of life is not to save the world but to attain God Realization which, by being in the process of doing so, you have a tremendously powerful and positive effect on the world condition and consciousness.
Notice that the more you become a connoisseur of gratitude, the less you are the 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.