In his Epistle to the church in Ephesus, Apostle Paul exhorts the church to be fully armored with spiritual weapons to fight spiritual battle with satan everyday (Ephesians 6:10-20). Belt is one of the armors believers are must to have. The belt of Truth must be girded around the waist because a soldier cannot secure his sword without a belt. There will be no place to put his sword around his waist (6:14a). In the Roman world, even when a soldier is not carrying all other weapons, he must be girded with his belt readily. So do believers have to have this belt of Truth in all circumstances.
What is truth?
“Sanctify them by Your truth. Your word is truth.” John 17:17
Lexham Press. Logos Bible Software Infographics. Bellingham, WA: Lexham Press, 2009.