Matthew Henry's Concise Commentary

5:12-16 The separation of hypocrites by distinguishing judgments, should make the sincere cleave closer to each other and to the gospel ministry. Whatever tends to the purity and reputation of the church, promotes its enlargement; but that power alone which wrought such miracles by the apostles, can rescue sinners from the power of sin and Satan, and add believers to His worshippers. Christ will work by all his faithful servants; and every one who applies to him shall be healed.