Their wives in the same way must be reverent, not slanderers, temperate, faithful in all things.
faithful in all things: This expression means trustworthy. The great lesson here is that the wives of deacons can help their husbands and the church beyond measure by being always discreet and diligent. Albert Barnes sums up the matter like this: "Wives should be faithful to their husbands, to their families, to the church, to the Savior."