He that is not with me, is against me
These words chiefly refer to Satan, and are a further proof, that Christ did not cast out devils by him; since they two are as much opposites, as can possibly be; Satan is not on the side of Christ, but an adversary to him; there is an original, and implacable enmity, between the serpent and the seed of the woman; there is an open war between them, and therefore one cannot be thought to lend assistance to the other. They were concerned in different things, had different views and interests, and so took different methods;
and he that gathereth not with me, scattereth:
Christ is the good shepherd, that gathers his sheep to himself, and into his fold, by the external ministry of the word, and internal efficacy of his grace; Satan is the wolf, that catches and scatters the sheep, and seeks to kill and destroy them: and since there is such an open war proclaimed and carried on between Christ and the devil, none ought to be neutral; whoever is not on the side of Christ, is reckoned as an enemy; and whoever is not concerned by prayer or preaching, or other means to gather souls to his word and ordinances, and to his church, and to himself, is deemed by him a scatterer of them.