Nicene and Post-Nicene Fathers, Vol. IV:
Writings in Connection with the Manichæan Controversy.: Chapter 26

Chapter 26.—The Manichæans are Reduced to the Choice of a Tortuous, or Curved, or Straight Line of Junction.  The Third Kind of Line Would Give Symmetry and Beauty Suitable to Both Regions.

What more is to be got? we have now heard what is on the border.  Make what shape you please, draw any kind of lines you like, it is certain that the junction of this boundless mass of the region of darkness to the region of light must have been either by a straight line, or a curved, or a tortuous one.  If the line of junction is tortuous the side of the region of light must also be tortuous; otherwise its straight side joined to a tortuous one would leave gaps of infinite depth, instead of having vacuity only above the land of darkness, as we were told before.  And if there were such gaps, how much better it would have been for the region of light to have been still more distant, and to have had a greater vacuity between, so that the region of darkness might not touch it at all!  Then there might have been such a gap of bottomless depth, that, on the rise of any mischief in that race, although the chiefs of darkness might have the foolhardy wish to cross over, they would fall headlong into the gap (for bodies cannot fly without air to support them); and as there is infinite space downwards, they could do no more harm, though they might live for ever, for they would be for ever falling.  Again, if the line of junction was a curved one, the region of light must also have had the disfigurement of a curve to answer it.  Or if the land of darkness were curved inwards like a theatre, there would be as much disfigurement in the corresponding line in the region of light.  Or if the region of darkness had a curved line, and the region of light a straight one, they cannot have touched at all points.  And certainly, as I said before, it would have been better if they had not touched, and if there was such a gap between that the regions might be kept distinctly separate, and that rash evildoers might fall headlong so as to be harmless.  If, then, the line of junction was a straight one, there remain, of course, no more gaps or grooves, but, on the contrary, so perfect a junction as to make the greatest possible peace and harmony between the two regions.  What p. 142 more beautiful or more suitable than that one side should meet the other in a straight line, without bends or breaks to disturb the natural and permanent connection throughout endless space and endless duration?  And even though there was a separation, the straight sides of both regions would be beautiful in themselves, as being straight; and besides, even in spite of an interval, their correspondence, as running parallel, though not meeting, would give a symmetry to both.  With the addition of the junction, both regions become perfectly regular and harmonious; for nothing can be devised more beautiful in description or in conception than this junction of two straight lines. 283

Footnotes

[This discussion of the lines bounding the Kingdom of Light and the Kingdom of Darkness seems very much like trifling, but Augustin’s aim was to bring the Manichæan representations into ridicule.—A.H.N.]