We know Christ's redemption is effective because God the Father first trusted the Son to fulfill His promise, and the Son accomplished everything required for our salvation.
The effectiveness of Christ's redemption is underscored in Scripture, particularly in Ephesians 1, where it states that the Father trusted the Son to redeem His people. When the Son took on humanity, He fulfilled all righteousness by obeying the law perfectly, which was essential for our justification. God had made a covenant with the Son, promising that those whom He would redeem would be accepted based on the Son's perfect obedience. The Son's subsequent sacrificial death—bearing the sins of His people—was the ultimate fulfillment of this promise. Believers can have assurance of their salvation precisely because the Father trusted the Son, and the Son did not fail in His mission, thus affirming the reality and effectiveness of His redeeming work.
Scripture References:
Ephesians 1:10-12, John 17:1, Romans 8:1-4, Romans 8:29-30, Galatians 3:13, Romans 8:1, Hebrews 9:11-12, John 6:39, Ephesians 1:4-5; Romans 3:24-26; John 10:27-29, Hebrews 9:14, Romans 8:38-39, Romans 4:25, Romans 3:26, Matthew 5:17, Acts 20:28, Romans 5:8
Commentary