6:14 truth. The “whole armour of God” (Ephesians 6:11,13) involves seven units, all of which are vital if we are to prevail lastingly in the spiritual conflict with the great enemy of our souls. We must, first of all, be strongly girded about with truth—that is, the Word of God, and all its counsel (John 17:17; Acts 20:27)—if we hope to stand against the father of lies (John 8:44).
6:14 righteousness. The “breastplate of righteousness,” protecting the heart and lungs which provide life and breath to carry on the fight does not refer to personal righteous behavior (always imperfect at best) but His righteousness, imputed to us and in us (I Corinthians 1:30; II Corinthians 5:21) through faith by grace and thus eternally impregnable.