Nicene and Post-Nicene Fathers, Vol. IV:
Writings in Connection with the Donatist Controversy.: Chapter 7

Chapter 7.—12.  Lucianus of Rucuma 1773 said:  "It is written, ‘And God saw the light that it was good, and God divided the light from the darkness.’ 1774   If light and darkness can agree, then can there be something in common between us and heretics.  Therefore I give my judgment that heretics should be baptized." 1775

13.  To him the answer is:  If light and darkness can agree, then can there be something common between the righteous and unrighteous.  Let him therefore declare his judgment that those unrighteous should be baptized afresh whom Cyprian confuted within the Church itself; or let him who can say if those are not unrighteous "who renounce the world in words and not in deeds."

Footnotes

Rucuma was in ecclesiastical province of Zeugitana.  This Lucianus is probably the same with the one mentioned in Cypr. Epp. lvii., lxx.

Gen. i. 4.

Conc. Carth. sec. 43.