To open to the sense, to become really conscious, you have to drop out of the future and the past and remain for a time in what T. S. Eliot called "the still point of the turning world" — the present. The only true reality is the present.
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.