But concerning the Medium by whose sensitive Nature our Magick Force is transmitted to the Object of our Working, doubt not. For already in other Galaxies of Physics have we been compelled to postulate an Aethyr wholly hypothetical in order to explain the Phenomena of Light, Electricity, and the like; nor doth any Man demand Demonstration of the Existence of that Aethyr other than its Conformity with general Law. Thou therefore, Creator and Transmitter of thine own Energy, needest not to ask whether by this or by some other Means thou performest thy Work. Yet I know not why this Aethyr of the Mathematicians and the Physicians should not be one with the Astral Light, or Plastic Medium or Aub, Aud, Aur (these three being a Trinity) of which our own Sages have spoken. And this Meditation may bring forth much Knowledge physical, which is good, for that which is above is like that which is beneath, and the Study of any Law leadeth to the Understanding of all Law. So mayst thou learn in the End that there is no Law beyond Do what thou wilt.