How do we know salvation is finished in Christ?

The assurance of salvation being finished rests on Christ’s declaration at the cross, 'It is finished' (John 19:30). This signifies that all the requirements for redemption have been fulfilled in Him. Hebrews 4 echoes this by stating that believers who enter into Christ's rest have ceased from their own works, as God rested from His. It underscores that salvation is not an ongoing effort but rather a completed work in the person and work of Christ (Hebrews 4:10). Hence, faith prompts us to trust in this accomplished work rather than in our own efforts.