Say to Archippus. St. Chrysostom and blessed Theophylact ask, Why does he not write to him? Probably there was no need, and such a slight reminder was enough to make him more zealous in ministry and them more obedient to him. Ambrosiaster says, Through the people themselves he exhorts their presiding minister to care more for their salvation. Since the Epistle was written because of the needs of the flock, the Apostle directed it to the Church and not to its pastor. Blessed Theophylact, from St. Chrysostom, says, Certainly the Apostle writes to them, Say to Archippus, so that, when he begins to reprove them in something, they may have no ground to murmur against him as a burdensome man who fills them with bitterness. They will know that such a command was given him by St. Paul, and that their own mouths conveyed to Archippus what Paul requires of him in relation to them. Thus, to stop their mouths, Paul acted very wisely by saying, Say to Archippus. Even apart from this, everyone knows that it is improper for disciples to discuss the affairs of the teacher.
Take heed, βλεπε, means watch. St. Chrysostom and blessed Theophylact say, This is everywhere the voice of one who alarms and warns. Thus he says, Beware of dogs (Phil 3:2); Beware lest anyone deceive you (Col 2:8); Take heed lest this liberty of yours become a stumbling block to the weak (cf. 1 Cor 8:9). In general, the Apostle always speaks this way when he wishes to warn or alarm. So also here.
Take heed to the ministry, διακονιαν. Ambrosiaster says, After Epaphras, who watered the Colossians with the truths of the faith, the governance of the Church was laid upon Archippus, and he received it. Photius, in Oecumenius, says, Perhaps he was their bishop, or he bore some other ministry in the work of saving souls.
Which you have received in the Lord. St. Chrysostom says, In the Lord means through the Lord. He, that is, laid this duty upon you, not we. That you may fulfill it means holding zealous care for it day and night. Blessed Theophylact says, See that you fulfill properly the work received by you from the Lord. What work is this? To watch over the Colossians and care for them. The Apostle gives two exhortations with the one phrase in the Lord. He makes him more careful to fulfill his ministry as the work of the Lord. He also disposes them to submit to him more willingly, showing that they have been given into his hands by God.
According to tradition, Archippus was bishop in Colossae after Epaphras. He suffered there from the governor of Ephesus in the reign of Nero. His memory is on February 19 and November 22.