Stand firm, therefore, with your loins girded about with truth, and having on the breastplate of righteousness,

Eph. 6:13-17.

What service does the girdle of truth render in “the complete suit of armor from God”? In Paul’s day the military girdle was a leather belt worn around the waist or hips. It varied in width from two to six inches (5 to 15 cm) and was often studded with plates of iron, silver or gold. The warrior’s sword was suspended from it and at times the belt was supported by a shoulder strap. Even the coat of mail might thus be secured at the waist. (Judg. 3:15-17; Ps. 45:3, 4) Such a girdle provided support and protection for the loins. Likewise, truth can strengthen the embattled Christian in his determination to remain firm when subjected to trialsome situations.

Essential, too, is the “breastplate of righteousness.” The need of righteousness as a protective breastplate can readily be appreciated when we consider the sinful bent of the heart. The Scriptures tell us: “The inclination of the heart of man is bad from his youth up.” (Gen. 8:21) “The heart is more treacherous than anything else and is desperate. Who can know it?” (Jer. 17:9) Only the righteousness that is based on faith in God’s arrangement for everlasting life and that is effected by his spirit can prevent the heart from yielding to sinful inclinations.​—Rom. 6:15-20.