There are two sources for change within you. One is the cunningness of your ego that pushes you into making efforts to become something other than you are meant to be so that it can give itself a boost, so that it can glorify itself. The other is the wisdom of Nature. Thanks to this wisdom you become aware, you understand it. That is all you do, leaving the change—type, the manner, the speed, the time of change—to Reality and to Nature.
