He that is not with me is against me: and he that gathers not with me scatters.
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Cyprian of Carthage
AD 258
For what can be ratified and established by God which is done by them whom the Lord calls His enemies and adversaries? setting forth in His Gospel, "He that is not with me is against me; and he that gathereth not with me, scattereth.".
And therefore Christ our Lord, setting forth that His spouse is one, and declaring the sacrament of His unity, says, "He that is not with me is against me, and he that gathereth not with me scattereth.".
For our Lord Jesus Christ, when He testified in His Gospel that those who were not with Him were His adversaries, did not point out any species of heresy, but showed that all whatsoever who were not with Him, and who, not gathering with Him, were scattering His flock, were His adversaries; saying, "He that is not with me is against me, and he that gathereth not with me scattereth."
“He that is not with me,” he says, “is against me, and he that gathers not with me, scatters.” “For I,” he says, “have come to save every man from the hands of the devil and to deliver from his deceit those whom he had ensnared. I came to set the prisoners free, to give light to those in darkness, to raise up them that had fallen, to heal the brokenspirited, and to gather together the children of God who were scattered abroad. This was the object of my coming. Satan is not with me; on the contrary he is against me. He ventures to scatter those whom I have gathered and saved. How then can he, who wars against me and sets his wickedness in array against my purposes, give me power against himself? How is it not foolish even barely to imagine the possibility of such a thing as this?” Commentary on Luke, Homily