What does it mean that Christ's train fills the temple?

The imagery of Christ's train filling the temple, as stated in Isaiah 6:1, represents His glory, authority, and the completeness of His redemptive work. In biblical culture, a king's train signifies his majesty and power. By saying that His train fills the temple, it illustrates that there is no room for anything else but Christ's righteousness and glory in the place of worship. Believers find refuge and protection under His covering, as we see Him exalted as our Savior who protects and sustains us. As we are robed in Christ's righteousness, we are assured of our acceptance before God.