Evidently Proclus does not advocate here simply a superstition, but science; for notwithstanding that it is occult, and unknown to our scholars, who deny its possibilities, magic is still a science. It is firmly and solely based on the mysterious affinities existing between organic and inorganic bodies, the visible productions of the four kingdoms, and the invisible powers of the universe. That which science calls gravitation, the ancients and the mediaeval hermetists called magnetism, attraction, affinity. It is the universal law, which is understood by Plato and explained in Timaeus as the attraction of lesser bodies to larger ones, and of similar bodies to similar, the latter exhibiting a magnetic power rather than following the law of gravitation. The anti-Aristotelean formula that gravity causes all bodies to descend with equal rapidity, without reference to their weight, the difference being caused by some other unknown agency, would seem to point a great deal more forcibly to magnetism than to gravitation, the former attracting rather in virtue of the substance than of the weight. A thorough familiarity with the occult faculties of everything existing in nature, visible as well as invisible; their mutual relations, attractions, and repulsions; the cause of these, traced to the spiritual principle which pervades and animates all things; the ability to furnish the best conditions for this principle to manifest itself, in other words a profound and exhaustive knowledge of natural law — this was and is the basis of magic.
Helena Petrovna Blavatsky