How do we know Christ's redemption is truly for His people?

The assurance of Christ's effective redemption for His people is found within key biblical texts. For instance, Matthew 1:21 states that Jesus came to save His people from their sins. This direct identification underscores that His redemptive work was not random or universal but intentionally directed towards a specific group. Furthermore, in John 10:11, Jesus declares Himself as the good shepherd who lays down His life for the sheep, affirming the particularity of His atonement. His sacrifice is portrayed as a completed action, ensuring that those called and chosen by God will inevitably come to Him in faith.