We are saved by grace through faith in Christ (Ephesians 2:8-10). Our salvation is the eternal purpose and work of God the Father. Our salvation was purchased through the Son of God at the cross. Christ effectively works in us by the Holy Spirit.
God the Father chose to save us in Christ before the world began (Ephesians 1:4-6). God's eternal purpose in Christ was foreordained. God called us through the gospel to be justified by faith in Christ. That's how God saves believers through Christ.
God the Father works through His only begotten Son to save believers (John 3:16). Jesus accomplished the Father's will through His sacrificial death and resurrection. That is the gospel of our salvation in Christ (1 Corinthians 15:1-4). God the Father works through the Son to save all who believe.
The Holy Spirit applies salvation in us through Christ (Romans 8:9). "He who has begun a good work in you will complete unto the day of Jesus Christ" (Philippians 1:6). The Holy Spirit changes our lives through faith in Christ. Believers are transformed by the Holy Spirit to walk in newness of life, through Jesus Christ our Lord (Romans 6:4, 12:2; 1 Corinthians 12:3).
