Why was a Wall not built between the Domains?

If, therefore, the Darkness is finally tormented by that Luminous Nature in which it takes pleasure, what was the cause of the negligence long ago (which brought it about) that the Darkness obtained dominion over all this and took pleasure therein? And what is the cause of its fierceness so that at last the Darkness is imprisoned and tormented in it? If its 'Essential nature' has this strength, then where was [lxxii] it "formerly? But if this energy conies from another place, why did it not come formerly? So that instead of the Grave which is now built stupidly for the Darkness, an impregnable wall should have been built, and thus there would have been (a separation) between the two Domains, (such a wall) as it would be fitting for the Good (Being) to make, and right for the Just (Being) to keep in repair, and proper for the Wise (Being) to guard. But after those atrocities which the Darkness wrought [Cf. p. XXXV.] upon the Light, and after those blasphemies which the Souls blasphemed against their Father, and after they committed fornication and folly and polluted and disgraced themselves, [P. 90.] and after great blemishes have appeared in them, so that, although their wounds may be healed, they cannot be effaced, and the places of their spots cannot be covered up, after all this Strife and Contention, and after all this misery and loss [Cf. p. lvi. ll.13, 26 f.]  -- even if there was a gain, the gain of such things would not be equal to the loss -- he has planned to-day to build a Grave for the Darkness so that at last it may be imprisoned there.

And how can a Grave limit him who is infinite? For if the Darkness can be limited, then the Light also can be limited. And if the Good (Being) cannot be limited, but the Evil One can be limited, it is clear that this Evil One who can be limited is not an (eternal) Entity, the Companion of that Good (Being) who is not limited; and it is found that that which limits is an (eternal) Entity, and that which is limited by whoever is able to limit him, is a creature. But if he is not a creature and is an (eternal) Entity, an Entity cannot limit an Entity without itself being also limited by that other one, his equal, which is limited.[P. 91.]

THE END OF THE THIRD DISCOURSE.