How do we know Christ's righteousness can save us?

The assurance of salvation through Christ's righteousness is rooted in His sacrificial death on the cross, which fulfilled the requirements of the Law for all who believe. According to Hebrews 10:14, by one sacrifice, He has made perfect forever those who are being made holy. This concept aligns with the Five Points of Grace, particularly the idea that we are justified by faith alone through grace alone, as emphasized in Ephesians 2:8-9. The believer can have confidence in salvation because it is not based on personal merit but solely on the finished work of Christ, who took upon Himself the penalty for sin and is our representative before God.