How do we know Christ's redemption is for the elect?

The doctrine of particular redemption, or definite atonement, teaches that Christ died specifically for those whom the Father has chosen. In John 10:15, Jesus states, 'I lay down my life for the sheep,' indicating that His sacrificial death was not for all without exception but for His chosen ones. Furthermore, Matthew 1:21 declares that Jesus will save His people from their sins, underscoring the particularity of His redemptive work. This understanding is critical to grasping the depth of God's grace in election and the assurance it brings to believers regarding their salvation.