Tetrabiblos: Ruhun Nitelikleri

The consideration of circumstances applicable to the body is practised under the foregoing rules. Of the spiritual qualities, however, all those which are rational and intellectual are contemplated by the situation of Mercury; while all others, which regard the mere sensitive faculties, and are independent of reason, are considered rather by other luminaries of a less subtle constitution and more ponderous body; for instance, by the Moon and such stars as she may be configurated with, as well as by separation, as by application. Now the mind is liable to impulse in a multiplicity of directions, and the investigation of them cannot be summarily nor hastily performed, but must be conducted by means of many various observations. Should the said planets not be posited in places particularly appropriate to themselves, they will yet infuse into the composition of the mental energy the properties of their own nature; but obscurely and imperfectly, and not with such force and strong evidence as in the other case. The peculiar qualities of planets in dominion, or in elevation, are powerfully impressed upon the mental energy.