How do we know that salvation is based on Christ's work?

Salvation in the Reformed tradition is rooted in the understanding that it is not through our deeds or righteousness that we are saved but through the grace of God in Christ. Ephesians 2:8-9 emphasizes that we are saved by grace, through faith, as a gift from God—'not of works, lest any man should boast.' Our righteousness comes from Christ alone, highlighted in Romans 5:19, where it states that through one man's obedience (Christ), many will be made righteous. The Christian is justified and accepted based on Christ's finished work, ensuring that our standing before God does not hinge on our efforts.