4:10-18 Paul had differed with Barnabas, on the account of this Mark, yet he is not only reconciled, but recommends him to the churches; an example of a truly Christian and forgiving spirit. If men have been guilty of a fault, it must not always be remembered against them. We must forget as well as forgive. The apostle had comfort in the communion of saints and ministers. One is his fellow-servant, another his fellow-prisoner, and all his fellow-workers, working out their own salvation, and endeavouring to promote the salvation of others. The effectual, fervent prayer is the prevailing prayer, and availeth much. The smiles, flatteries, or frowns of the world, the spirit of error, or the working of self-love, leads many to a way of preaching and living which comes far short of fulfilling their ministry. But those who preach the same doctrine as Paul, and follow his example, may expect the Divine favour and blessing.
12. Christ—The oldest manuscripts add "Jesus."
labouring fervently—As the Greek, is the same, translate, "striving earnestly" (see on Col 1:29 and Col 2:1), literally, "striving as in the agony of a contest."
in prayers—Translate as Greek, "in his prayers."
complete—The oldest manuscripts read, "fully assured." It is translated, "fully persuaded," Ro 4:21; 14:5. In the expression "perfect," he refers to what he has already said, Col 1:28; 2:2; 3:14. "Perfect" implies the attainment of the full maturity of a Christian. Bengel joins "in all the will of God" with "stand."