Every emotion arises from the intensity of the vibrations which, when active in different directions, produce different emotions, the main cause of every emotion being activity alone. Every vibration while active raises the consciousness to the outermost surface, and the mist caused by this activity collects clouds which we call emotions. The clouds of emotion obscure the clear sight of the soul. Therefore passion is called blind. The excess of activity of vibrations not only blinds, but weakens the will, and a weak will enfeebles the mind and body.