Ambrose of Milan

The good architect lays the foundation first and afterward, when the foundation has been laid, plots the various parts of the building, one after the other, and then adds to it the ornamentation.… Scripture points out that things were first created and afterward put in order lest it be supposed that they were not actually created and that they had no beginning, just as if the nature of things had been, as it were, generated from the beginning and did not appear to be something added afterward.

The Spirit fittingly moved over the earth, destined to bear fruit because by the aid of the Spirit it held the seeds of new birth which were to germinate according to the words of the prophet: "Send forth thy Spirit and they shall be created and thou shalt renew the face of the earth."