Contrast is the root of both personal and universal expansion. A physical human is meant to sort through the wanted and unwanted elements of this time space reality so as to give rise to desire. And then, to line up with that desire with their thoughts, words and actions. Doing so, causes a person to actualize the expansion. But this improved state of being will come with a new set of contrast. And so, the process starts all over again, propelling the person into the ever-expanding state of being.