How do we know Jesus Christ is our salvation?

In the sermon, the preacher emphasizes that 'The stone which the builders refused has become the headstone of the corner.' This signifies Jesus Christ's role as the foundation of our salvation, rejected by many but chosen by God. He is the only one capable of providing righteousness for sinners; thus, our faith rests solely on His perfect obedience and sacrifice. A true understanding of salvation recognizes that it is not based on our works but on the work of Christ, who willingly became our sacrifice. As believers, we declare that Jesus is our salvation, rooted in the strength of His merit and the fulfillment of God's redemptive plan.