John Gill Bible Commentary

He that is not with me, is against me,.... Our Lord does not mean one, that was not personally with him; for there might be some, and doubtless were many, who were not in person with him, and yet were not against him, but friends to him, and to his interest; nor one that was not a professed disciple of his, or not a follower of him, and his apostles; for there were some who called themselves John's disciples, and did not attend on Christ, and yet were not against him, but cast out devils in his name; and such an one perhaps was he, that is made mention of in Mar 9:38 on occasion of whom, Christ there says some words, which may seem at first view, not so well to accord with these: but such are intended, who acted a neutral part between him and the Pharisees; who could bear to hear them accuse him of casting out devils by the prince of devils, and be easy at it: and such persons are condemned, who can hear all manner of blasphemy against the deity, sonship, blood, righteousness, and sacrifice of Christ, and express no indignation at it; these, as they cannot be said to be with Christ, may be truly ranked among those that are against him: and he that gathereth not with me, scattereth; whoever did not encourage persons to attend on the ministry of Christ, which was confirmed by such miracles the Pharisees spoke so reproachfully and contemptuously of, were reckoned by Christ as such, who were the means of hindering persons gathering unto him; as well as those who menaced and excommunicated them for so doing: the allusion is either to the gathering of the sheep into the fold, and the scattering of them by the wolf; or to the gathering of the wheat, and binding it in sheaves, and bringing it home in harvest; and to the scattering of the wheat loose in the field, whereby it is lost, and comes to nothing; See Gill on Mat 12:30.