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.
Without going outside, you may know the whole world. Without looking through the window, you may see the ways of heaven. The farther you go, the less you know.
Thus the sage knows without traveling ... sees without looking ... works without doing.