Indeed, if we examine attentively that in which this illumination of the darkness consists, the (Gnostics) may be led to a recognition of the true principles of the world. Why was the production of this illumination of the darkness necessary, if its existence was not absolutely unavoidable? This necessity (of an illumination of the darkness) was either in conformity with, or in opposition to nature. If it conformed thereto, it must have been so from all time; if it were contrary thereto, something contrary to nature would have happened to the divine powers, and evil would be prior to the world. Then it would no longer be the world that was the cause of evil (as the Gnostics claim), but the divine powers. The world is not the principle of evil for the soul, but it is the soul that is the principle of evil for the world. Ascending from cause to cause, reason will relate this world to the primary principles. EVEN THE EXISTENCE OF THE DARKNESS MUST BE RELATED TO THE SOUL. If matter is also said to be the cause of evil, where does it originate? For the darkness existed already, as say (the Gnostics), when the soul has seen and illuminated them. From whence (comes darkness)? If (the Gnostics) answer that it is the soul herself that created (darkness) by inclining (downwards to matter), then evidently (the darkness) did not exist before the inclination of the soul. Darkness therefore is not the cause of this inclination; the cause is in the nature of the soul. This cause may thus be related to preceding necessities, and as a result to first principles.[365] INSTEAD OF COMPLAINING OF THE WORLD, UNDERSTAND IT AND FIT YOURSELF TO IT.