How do we know that grace is unshakable?

The unshakable nature of grace comes from the eternal and finalized work of Christ on the cross. Hebrews 10:14 states, 'For by one offering he hath perfected forever them that are sanctified,' highlighting that the work of Christ is sufficient and complete. When we stand in Him, we are unshakable because we are covered by His grace. As described in Hebrews 12:28, we 'receive a kingdom that cannot be moved.' This assurance allows believers to serve God acceptably, knowing His promise endures forever.