How do we know salvation through Christ is sure?

The assurance of salvation through Christ rests on the sufficiency of His atoning sacrifice and the divine will behind it. As stated in 2 Timothy 1:9, God has saved us and called us according to His purpose, not based on our works but by His grace. The finished work of Christ at the Cross declares that all who believe in Him are redeemed, establishing a solid foundation for assurance. Additionally, John 10:28-29 highlights that believers are held securely in Christ's hand, affirming that nothing can separate us from the love of God. This reality allows us to rest in the promise of our salvation as the result of God's eternal plan.