Mateus 12
Chromatius of Aquileia · Comentário Patrístico (catena)
Mateus 12:25
The Lord declared that a kingdom or city or house divided against itself could not stand. This was said in reference to the kingdom that the Jews themselves occupied under the rule of Jeroboam, the servant of Solomon, which was judged as abandoned before being divided. The Jews would lose entirely the city of Jerusalem, to which Samaria had been hostile. They would lose the dwelling place of God's temple against which golden calves and the house of idols had been erected. He showed them that they ought rather to follow that kingdom that cannot be divided—that is, the heavenly and eternal one. The spiritual city of Jerusalem always remains fixed and immovable. No hostile power ever has been or will be able to overcome the true house of God. That house which is protected by the Son of God is quite safe. — TRACTATE ON MATTHEW 49.5
Mateus 12:30
And rightly Jesus adds, "He who is not with me is against me. And he who does not gather with me scatters." By this he meant that his work is one thing and the devil's work another. For the devil is the enemy of human well being. It is proper for the devil to scatter to utter destruction and for Christ to gather to salvation. Hence it is clear that one who is against the Lord cannot be with the Lord. Therefore, although the Lord seems to be repudiating those Pharisees who, unwilling to gather with Christ, have remained the Lord's enemies and adversaries, he speaks also of all heretics and schismatics. Drawing impious conclusions against the church or the Lord by way of unorthodox teachings or schismatic beliefs, they aim to tear asunder and ravage the incorrupt body of the church and the unity of peace and faith. They are oblivious to Solomon's words: "He who splits a log is endangered by it." Clearly those who cause separation in the church shall run the risk of eternal death. — TRACTATE ON MATTHEW 50.2.25