How do we know that salvation is finished in Christ?

The concept of completed salvation is pivotal in Reformed theology. Christ's declaration, 'It is finished' (John 19:30), signifies that all the necessary work for redeeming humanity was accomplished on the cross. Not only does this reflect the finality of atonement, but it also assures believers that their forgiveness is secured by His perfect sacrifice. Hebrews 4:9 also highlights this idea by stating that there remains a rest for the people of God, indicating that because Christ has finished His work, believers are invited to enter into this rest and cease from their own efforts to achieve righteousness. Believers can, therefore, be confident in their salvation, recognizing it as wholly reliant on Christ’s completed work, not their own.