9. The spiritual phenomena consist in different modes of manifestation of soul or spirit during the incarnation, or in their discarnate state. It is by its manifestations that the soul reveals its existence, its survival, and its individuality; and it is judged by its effects. The cause being natural, the effect is equally so. These effects made the special object of research in the study of Spiritism, in order to arrive at knowledge as completely as possible of the nature and of the attributes of the soul, as well as of the laws which govern the spiritual principle.