I. The following are some of its manifestations when placed under the influence or control of material conditions. (a) The power of the mind in interpreting our sensations; (b) Its power in recalling past ideas (memory) and raising future expectation; (c) Its power as exhibited in what are called by modern psychologists "the laws of association," which enables it to form persisting connections between various groups of sensations and possibilities of sensations, and thus generate the notion or idea of an external object; (d) Its power in connecting our ideas together by the mysterious link of memory, and thus generating the notion of self or individuality. II. The following are some of its manifestations when liberated from the bonds of matter:-- (a) Clairvoyance. (b) Pyschometry. Itchasakti:--Literally the power of the will. Its most ordinary manifestation is the generation of certain nerve currents which set in motion such muscles as are required for the accomplishment of the desired object. Kriyasakti:--The mysterious power of thought which enables it to produce external, perceptible, phenomenal results by its own inherent energy. The ancients held that any idea will manifest itself externally if one's attention is deeply concentrated upon it. Similarly an intense volition will be followed by the desired result. A Yogi generally performs his wonders by means of Itchasakti and Kriyasakti. Kundalinisakti:--Literally the power or force which moves in a serpentine or curved path. It is the universal life-principle which everywhere manifests itself in Nature. This force includes in itself the two great forces of attraction and repulsion. Electricity and magnetism are but manifestations of it. This is the power or force which brings about that "continuous adjustment of internal relations to external relations" which is the essence of life according to Herbert Spencer, and that "continuous adjustment of external relations to internal relations" which is the basis of transmigration of souls or punarjanmam (re-birth) according to the doctrines of the ancient Hindu philosophers. A Yogi must thoroughly subjugate this power or force before he can attain moksham. This force is, in fact, the great serpent of the Bible. Matrikasakti:--Literally the force or power of letters or speech or music. The whole of the ancient Mantra Shastra has this force or power in all its manifestations for its subject-matter. The power of The Word which Jesus Christ speaks of is a manifestation of this Sakti. The influence of its music is one of its ordinary manifestations. The power of the mirific ineffable name is the crown of this Sakti. Modern science has but partly investigated the first, second and fifth of the forces or powers above named, but it is altogether in the dark as regards the remaining powers.