Christ is God's Elect One, and our election is in Christ alone. "Behold! My Servant in whom I uphold. My Elect One in whom My soul delights" (Isaiah 42:1). This prophecy reveals the coming Christ as God's Elect One. Election includes all who believe the gospel of Christ. That is to say, our election is in Christ alone (1 Peter 1:1-2). Those who reject the gospel of Christ have no one to blame but themselves.
Our salvation from eternal judgment is in the Elect One. Christ is our deliverance from condemnation. Election is God the Father's choice to save sinners in Christ (Ephesians 1:4-6). Reprobation is the opposite of election. It is the choice of those who reject God's salvation in Christ (John 3:18).
Our salvation is confirmed through faith in the Elect One (2 Peter 1:1, 10). God gives mercy to sinners through Christ crucified (Romans 5:8). Christ risen from the dead brings justification to sinners by faith alone (Romans 4:5; 10:9). Faith in Christ makes our calling and election sure.
Our salvation is to the praise of God's glory in the Elect One. God saves us by faith in Christ to the praise of His glorious grace (Ephesians 1:6). To the contrary, those who choose to reject Christ are lost to their own just condemnation (John 3:19, 36).