First, in regard to the subject, medium or seer. There are two distinct temperament in which the faculty is likely to be dominant, and capable of high and rapid culture. There is the nervous temperament associated, with a high muscular development, classified as the "mental-motive" temperament. It is characterized by extreme activity of body and mind, a certain nervous excitability, prominent features, full osseous development, prominent brows, intent gaze, and generally a swarthy complexion. This type represents the _positive_ seers, in whom the mind goes out towards the images of the soul. The other, in whom the _passive_ temperament is present, and to whom the soul-images come by passive reflection, as things mirrored in a moveless lake, are known by the following characteristics: Full and lymphatic habit, pale or delicate complexion, generally blue eyes, straight fine hair; small, plump, and cold hands; a high, piping or feeble voice, and languid disposition. These two types--of which there are many varieties--achieve their psychic development by quite opposite means. The positive seer works with effort, throwing out the soul-images by the power of his will, perceiving them with more or less accuracy, and thereafter turning them over in the mind, reasoning and questioning concerning their import and meaning. The passive seer, on the contrary, works not at all and makes no effort, the visions coming slowly, almost imperceptibly, and in most cases having a literal interpretation. The visions in this case are not allegorical, emblematic, or symbolic, as in the case of the positive seer, but are actual visions of facts just as they have happened, or will transpire in the future. Of the two orders, the passive is the more serviceable because the more perspicuous, but it has the disadvantage of being largely under the control of external influences, and hence is frequently incapable of "seeing" anything whatever. The positive type of seer exercises an introspective vision, searching inwardly towards the soul-world whence the revelations proceed. Of what nature these revelations are will appear in the following pages. The passive type of seer, on the contrary, remains _in statu quo_, open to impressions coming inwards towards the perceptive faculty, but making no effort towards either outward or inward searching. The success of each depends upon the observance of that method which is agreeable to their respective temperaments. In regard to the qualifications which should supplement and sustain the natural aptitude of the seer or seeress, the following remarks may be of general service.