Finally, there are the passages which say that no one can go out from heaven or hell. In eternity God planned our salvation and chose us to be his own. In time he sent his Son to become fully human to live a perfect life under the law and to suffer and die for the sins of the world. God has justified and reconciled the world in Chirist. We receive the benefits of Chirist's work of redemption through faith which the Holy Spirit creates in us and preserves through the means of grace, the gospel in Word and sacraments.
Good works flow from faith.
Good works are the result of the Holy Spirit's work in our hearts and are not a cause of our salvation. None of them were of us. None of the passages the inquirer cites as evidence that a true believer cannot fall away say that. It does not say such a person could never fall into unbelief. He does not say it is impossible for us to walk away.