The belt of truth is the first piece of the “full armor of God” to be listed in Ephesians 6:10–17. The passage begins with the admonition from the apostle Paul to “be strong in the Lord and in the strength of his might.” This is the key to understanding the armor of God. All the pieces of the armor belong to Him and come from Him. Truth, righteousness, the gospel, faith, and salvation—all are gifts of God to His people for their defense. All except “the sword of the Spirit, which is the Word of God” (verse 17) are defensive in nature. All are designed to help us “stand against the schemes of the devil” (verse 11). The belt of truth is the first part of the armor listed because, without truth, we are lost, and the schemes of the devil will surely overpower us.
It is fitting that the belt of truth is the first piece of the whole armor of God. Jesus is “the way, the truth, and the life” (John 14:6), and it is only through Him that we come to God. Therefore, truth is of the utmost importance in the life of a Christian. Without truth, the rest of the armor would be of no use to us because we would not have the Spirit of truth (John 15:26).
In referring to the whole armor of God, Paul invokes the image of a soldier ready for battle. The belt of a Roman soldier in Paul’s day was not a simple leather strap such as we wear today. It was a thick, heavy leather and metal band with a protective piece hanging down from the front of it. The belt held the soldier’s sword and other weapons. The belt of truth of the spiritual armor holds the sword of the Spirit, linking truth and the Word of God (cf. John 17:17). The Word of God is truth.
Depending on the translation of Ephesians 6:14, we are to fasten the belt of truth around us (ISV), buckle the belt around our waists (NIV), gird our waists with truth (NKJV), or gird our loins with truth (NASB). No matter the wording, we are to actively lay hold of the truth and use it. The belt of truth is a crucial piece of defensive armor guarding our inmost being in the battle against the lies and deceptions of the enemy. Without an understanding of truth, we are left vulnerable to being “carried about by every wind of doctrine, by the trickery of men, by craftiness in deceitful scheming” (Ephesians 4:14). The belt of truth protects us and prepares us for the battle that is part of every Christian’s life.