The Bible records that David, the shepherd boy chose not to wear the armor of a soldier, that King Saul armed him with, when he averred to fight the giant, Goliath (1 Samuel 17:38-39). But David did wear another kind of armor, an armor that was more effective than the physical armor that he chose not to wear, against an armored foe. It was a spiritual armor that He wore.
When Goliath defiantly disdained David by asking him as to why he came after him with sticks, David responded that He came to this battle in the Name of the Lord. In the Revelation of Jesus Christ, we learn that the name of the Lord is Faithful and True (Revelation 19:11). Jesus said, “I am the Way, the TRUTH and the Life” (John 14:6). David faced Goliath in the Name of the one that is Faithful and True. David girded Himself with the belt of TRUTH; The Truth that not only set Him free from fear (unlike his fellowmen), but also The Truth that set the Israelites free from being taunted and mocked.
Are we girded with the belt of Truth as was David? Without it, it would be impossible to bring down the giants that taunt, defy and scare us.
The belt of Truth when worn, shall make you free (indeed). The truth when known, shall make you free (John 8:32).