What does it mean that salvation is not due but done?

The phrase 'salvation is not due but done' captures the essence of the finished work of Christ. When Jesus declared 'It is finished' (John 19:30), He affirmed that the task of atoning for sin was fully accomplished. This is central to sovereign grace theology, which teaches that salvation is not something we can earn through our works or adherence to the law, but rather a gift that is given by God's grace. Romans 3:21-22 emphasizes that the righteousness of God is given through faith in Jesus Christ to all who believe, underscoring that no additional payment or effort is required from us. The assurance of this completed work enables believers to rest in Christ, knowing that our standing before God is secure in Him.