Think also, o my Son, of this Image, that if two States be at Peace, a Man goeth between them without Let; but if there be War, all Gateways are forthwith closed, save only for a few, and these are watched and guarded, so that the Obstacles are many. This then is the Case of Magick; for if thou have brought to Harmony all Principles within thee, thou mayst work easily to transmute a Force into its semblable upon another Plane, which is the essential Miracle of our Art; but if thou be at War within thyself, how canst thou work? For our Master Hermes Tresmegistus hat written at the Head of His Tablet of Emerald this Word: That which is above is like that which is below, and that which is below is like that which is above, for the Performance of the Miracle of the One Substance. How then, if these be not alike? If the Substance of Thee be Two, and not One? And herein is the Need of the Confession of a pure Heart, as is written in the Book of the Dead.