Fragment 5
Against the Synousiasts (Fragments) — translated by P. E. Pusey
Therefore you have the confession of the Incarnation of the Only-Begotten, from which also our faith is True. But if (as our opponents say) the Word united thereto, put off His Flesh, changing it into His own Nature, the change of the Flesh and the confession of our saving Faith will (it seems) come to an end together, and with it surely cease the justification too that is through it, we are yet in our sins, the filth of our old offences is still not cast away.
Translated by P. E. Pusey. Edition opa.patristics.cyril-of-alexandria.against-the-synousiasts-fragments.en.