The sermon begins by illustrating the public expectation of Christian conduct versus actual behavior, highlighting the call for Christians to live righteously. The core message focuses on the “breastplate of righteousness” from Ephesians 6:14, explaining it as a divine weapon and a new identity bestowed by God, not earned by human effort. This breastplate is not merely for passive identity but for active warfare against temptation and Satan’s schemes.

Drawing from Isaiah 59:17, the preacher emphasizes that God Himself, as the Divine Warrior, wears righteousness. This divine righteousness is necessary because humanity, including Israel (Isaiah 59:12-16), is deeply mired in sin, and even our best deeds are like “filthy rags” before God (Isaiah 64:6). God’s solution for sin, revealed in Christ, is the “Great Exchange” or “Double Imputation.” As 2 Corinthians 5:21 states, “For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God.” Christ, the only perfectly righteous person (Matthew 3:17), bore our sins and suffered death, though innocent, so that we, the guilty, could be declared righteous through faith in Him. This profound act of substitutionary atonement is further illuminated by Isaiah 53:4-6, which describes Christ bearing our infirmities and iniquities, and by His wounds, we are healed.

Understanding this imputed righteousness equips believers to combat Satan’s two primary attacks. First, Satan accuses believers of their failures and unworthiness, tempting them to doubt God’s love. The response is to affirm God’s unconditional love, demonstrated by Christ dying for us “while we were still sinners” (Romans 5:8), and His promise to graciously give us all things since He did not spare His own Son (Romans 8:32). Second, Satan tempts believers to use grace as a license to sin, suggesting that since God accepts us as we are, there’s no need to strive for holiness. The counter-argument is that God loves us too much to leave us as we are; He desires our holiness and glorification, aiming for a “radiant church, without spot or wrinkle” (Ephesians 5:27), which is ultimately what is best for us.

Practically, wearing the breastplate of righteousness means living out our new identity as “children of light” (Ephesians 5:8-9), producing the fruit of goodness, righteousness, and truth. This is not a burdensome legalism but a liberating way of life consistent with who we are in Christ. A crucial application is forgiveness. Unresolved anger and unforgiveness give “opportunity to the devil” (Ephesians 4:26-27) and allow him to “outwit us” (2 Corinthians 2:10-11), destroying relationships and churches. As Christ has forgiven us, so we are empowered to forgive others, resisting Satan’s destructive designs.

Bible Verses

– *Isaiah 59:17*

– God Himself uses justice as a breastplate, signifying His role as the Divine Warrior who fights for His people against sin.

– *Isaiah 59:12-16*

– These verses highlight humanity’s pervasive sinfulness, demonstrating the need for divine intervention as human righteousness is insufficient.

– *Isaiah 64:6*

– Our best deeds are likened to ‘filthy rags’ before God, underscoring the inadequacy of human righteousness.

– *2 Corinthians 5:21*

– Christ, who knew no sin, became sin for us, so that in Him we might become the righteousness of God; this is the core of the ‘Great Exchange’ or ‘Double Imputation’.

– *Matthew 3:17*

– Refers to Christ’s perfect righteousness as God’s beloved Son, making Him the only one qualified to bear our sins.

– *Isaiah 53:4-6*

– Describes the suffering Servant, Christ, bearing our diseases, pains, transgressions, and iniquities, by whose stripes we are healed.

– *Romans 5:8*

– God shows His love for us in that while we were still sinners, Christ died for us, combating Satan’s accusations of unworthiness.

– *Romans 8:32*

– He who did not spare His own Son but gave Him up for us all, how will He not also with Him graciously give us all things? This reassures believers of God’s complete love and provision.

– *Ephesians 5:27*

– God’s ultimate desire is to present the church to Himself ‘without spot or wrinkle,’ holy and blameless, showing His plan for our sanctification beyond mere justification.

– *Ephesians 5:8-9*

– Believers, once darkness, are now light in the Lord and should ‘walk as children of light,’ producing fruit of goodness, righteousness, and truth.

– *1 John 3:10*

– By this it is evident who are the children of God, and who are the children of the devil: whoever does not practice righteousness is not of God, nor is the one who does not love his brother.

– *Ephesians 4:26-27*

– ‘Be angry and do not sin; do not let the sun go down on your anger, and give no opportunity to the devil,’ emphasizing the danger of unforgiveness.

– *2 Corinthians 2:10-11*

– Forgiving others prevents Satan from gaining an advantage over us, as ‘we are not ignorant of his designs’ to destroy.