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 for this reason: Jesus has particularly died for his elect sheep so that their sin is paid in full.
Salvation is all of God for this reason: God has unconditionally chosen 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.