Pray daily! Dress God's Armor!

 The first element of our armor is truth (verse 14). This is easy to understand, since Satan is said to be the “father of lies” (John 8:44). Deception is high on the list of things God considers to be an abomination. A “lying tongue” is one of the things He describes as “detestable to Him” (Proverbs 6:16-17). We are therefore exhorted to put on truth for our own sanctification and deliverance, as well as for the benefit of those to whom we witness. Source: gotquestions.org

 Verse 14 a breastplate shielded a warrior’s vital organs from blows that would otherwise be fatal. This righteousness is not works of righteousness done by men. Rather, this is the righteousness of Christ, imputed by God and received by faith, which guards our hearts against the accusations and charges of Satan and secures our innermost being from his attacks. 

Source: gotquestions.org

 Verse 15 speaks of the preparation of the feet for spiritual conflict. In warfare, sometimes an enemy places dangerous obstacles in the path of advancing soldiers. The idea of the preparation of the gospel of peace as footwear suggests what we need to advance into Satan’s territory, aware that there will be traps, with the message of grace so essential to winning souls to Christ. Satan has many obstacles placed in the path to halt the propagation of the gospel. 

Source:  gotquestions.org

 The shield of faith spoken of in verse 16 makes Satan’s sowing of doubt about the faithfulness of God and His Word ineffective. Our faith—of which Christ is “the author and perfecter” (Hebrews 12:2)— is like a golden shield, precious, solid, and substantial. 

Source:  gotquestions.org

 The helmet of salvation in verse 17 is protection for the head, keeping viable a critical part of the body. We could say that our way of thinking needs preservation. The head is the seat of the mind, which, when it has laid hold of the sure gospel hope of eternal life, will not receive false doctrine or give way to Satan’s temptations. The unsaved person has no hope of warding off the blows of false doctrine because he is without the helmet of salvation and his mind is incapable of discerning between spiritual truth and spiritual deception.

Source: gotquestions.org
 

Verse 17 interprets itself as to the meaning of the sword of the Spirit—it is the Word of God. While all the other pieces of spiritual armor are defensive in nature, the sword of the Spirit is the only offensive weapon in the armor of God. It speaks of the holiness and power of the Word of God. A greater spiritual weapon is not conceivable. In Jesus’ temptations in the desert, the Word of God was always His overpowering response to Satan.

Source:  gotquestions.org