Try and give a unique mark to your mood, graphically compare it with someone else’s mood, express all the shades of your emotions in numbers: the dependency between the lack of confidence and fatigue, the mood when you feel hungry, the power of fears in the day time. We cannot accurately measure emotions in our world. For example, the relation between touching a warm body and the brain’s reaction to it, depends, among other things, on such factors as mood, condition of health, physical fitness and more. We cannot compare by percentage, or by quality of quantity, the pleasure we derive from music or a favorable dish.