How do we know that Christ's resurrection is key to our salvation?

Christ's resurrection is central to the Christian faith as it confirms His divine identity and the efficacy of His atoning work. As stated in 2 Samuel 22, Christ is exalted 'on high,' which corresponds to His current position at the right hand of the Father. This not only signifies His authority but also assures believers of their position in Him—'as He is, so are we in this world' (1 John 4:17). Our hope and assurance against sin and death are rooted in the fact that just as Christ was raised, we too will be raised and glorified. Thus, the resurrection is not just a historical event but the foundation of our faith and salvation.