Matthew Poole and continuators on 2 Corinthians 6:7

7 By the word of truth , by the power of God , by the armour of righteousness, on the right hand, and on the left .

Living up to, and keeping our eye upon the Word of God, which is the Word of Truth: This seemeth to be the sense rather than speaking truth to every one, (as some have thought.)

By the efficacious working of the Spirit of God upon our hearts, inabling us to live up to the Doctrine we preach. Some understand here, by the Power of God, that extraordinary Power of working Miracles, which God gave the Apostles; Others, the Gospel, which the Apostle calls the Power of God to Salvation, Rom. 1.16. It may be understood of the first and the last joined together; for the Gospel is no otherwise the Power of God to Salvation, than as it is attended, to the Souls of those to whom it is so made powerful, with the inward, powerful, efficacious working of the holy Spirit.

By the Armour of Righteousness, he means a good Conscience, (which cannot be without an universal rectitude, or uprightness of life) which is a defence against all Temptations, either from prosperity, or from adversity. In which sense that of Solomon is true, He that walketh uprightly, walketh safely, Prov. 10.9. and David prayeth, Psal. 25.21. Let integrity and uprightness preserve me.

Marginal references: 1 Cor. 2.4.; Chap. 10.4. Eph. 6.11, 13. 2 Tim. 4.7.