Every drop of blood contains in it a whole person’s individuality and totality, so much so that just one drop of blood is needed to make a medical diagnosis. Blood pressure is the balance – the interior harmony of a person – which is determined by the pressure that’s created by the flow of blood against the walls of its confining veins and arteries. While blood, as we have seen, represents the individuality and totality of a person, the veins and arteries represent the confines and limitations inside which a life flows along. That image helps us understand that each life is the result, so to speak, of both forward pressure and confining limitation.