Astrology, Phrenology, Physiognomy, and Palmistry have in common a search for positive knowledge whereby to regulate the affairs of life, to foretell the future, to comprehend one's destiny and capabilities. They aim to secure success, or at least to be forearmed against failure by being forewarned. This is a natural, a practical, and in no essential way an occult desire. It becomes occult, or, more accurately, superstitious, when it is satisfied by appeals to relations and influences which do not exist, and by false interpretation of what may be admitted as measurably and vaguely true and about equally important. When not engaged in their usual occupation of building most startling superstructures on the most insecure foundations, practical occultists are like Dr. Holmes's katydid, "saying an undisputed thing in such a solemn way." They will not hearken to the experience of the ages that success cannot be secured nor character read by discovering their unreal or mystic stigmata; they will not learn from physiology and psychology that the mental capabilities, the moral and emotional endowment of an individual are not stamped on his body in such a way that they may be revealed by half an hour's use of the calipers and tape-measure; they will not listen when science and common sense unite in teaching that the knowledge of mental powers is not such as may be applied by rule of thumb to individual cases, but that, like much other valuable knowledge, it proceeds by the exercise of sound judgment, and must as a rule rest content with suggestive generalizations and imperfectly established correlations. An educated man with wholesome interests and a vigorous logical sense can consider a possible science of character and the means of aiding its advance without danger and with some profit. But this meat is sheer poison to those who are usually attracted to this type of speculations, while it offers to the unscrupulous charlatan a most convenient net to spread for the unwary. In so far as these occult mariners, the astrologists and phrenologists _et id genus omne_, are sincere, and in so far represent superstition rather than commercial fraud, they simply ignore, through obstinacy or ignorance, the lighthouses and charts and the other aids to modern navigation, and persist in steering their craft by an occult compass. In some cases they are professedly setting out, not for any harbor marked on terrestrial maps, but their expedition is for the golden fleece or for the apples of the Hesperides; and with loud-voiced advertisements of their skill as pilots, they proceed to form stock companies for the promotion of their several enterprises and to dispose of the shares to credulous speculators.