Salvation is all of God for this reason: God will protect and preserve his elect to the end through an inseparable union with Christ.
Salvation is all of God for this reason: The Holy Spirit effectually calls all the elect into union with the risen Christ.
Salvation is all of God. Jesus particularly died for his elect sheep so that their sin is paid in full.
Salvation is all of God for this reason: God unconditionally chose his people in Christ before the foundation of the world.
Salvation must be all of God for this reason: All are under the power of sin and entirely unable to contribute to their salvation.