2 Corinthians 6:7

By the word of truth. By purely and sincerely preaching Gospel truth, let us show ourselves ministers of God.

By the power of God. By working miracles, or rather, with Chrysostom, by Christian constancy and fortitude displaying itself in so many adversities, so many labours, such vehemence of word, and so effectual preaching. All such things come to us through the power of God, and prove us to be powerful ministers of Him, worthy of all admiration.

By the armour of righteousness on the right hand and on the left. Both in prosperity and adversity let us take as our arms works of righteousness, i.e., of virtuous deeds springing from a righteous and holy life, that we may neither be lifted up by prosperity nor cast down by adversity. So Anselm. But Chrysostom and Theophylact say that the left hand denotes adversity, and the right prosperity, which two things, by alternate action, fortify the servants of God like armour, so that they are neither exalted to pride nor cast down into despondency.