Two brief (not exahustive) points: (as I’m typing on a tiny iPhone)
About John 5.24: here the phrase “hears My word” appears as just that but elsewhere in Scripture we read that phrase coupled with “and obeys” or something similar. Hence it’s well understood that in this passage the condition “and obeys” applies as well. It’s simply eisegesis for anyone to insist “and obey isn’t in John 5:24 so it doesn’t apply there”. It must be there, implied, or else Scripture contradicts Scripture. (Cf Luke 11:28 as an example)
IOW, it’s simply understood that if/when we read “hears My word” it also means obeying that Word or else it becomes a mere statement “I believe in God”; even the demons believe (and tremble) though.
WRT Heb 10, it’s another point of proper contextual (and in this instance translational) reading. In most versions, Heb 10:14 reads “...For by one sacrifice he has made perfect forever those who are being made holy”
Note the phrase “...being made holy”. This is a better way to understand “sanctified” in the passage of Heb. 10:10-14.
So, holiness is a condition to perfection.
Dragging out that misstatement really needs to stop. Let’s look at what was really said.
James 2:19 Thou believest that there is one God; thou doest well: the devils also believe, and tremble.
Notice it says that the devils also believe there is one God. It does NOT say they believe IN God, or ON God. On the other hand one is saved by belief ON the Lord Jesus Christ.
The jailor was told “believe on the Lord Jesus Christ and you will be saved”. That belief and trust carries a promise of not only salvation but of a changed life that includes acting on that faith just as Abraham did. It was Abrahams faith that saved but his actions that proved his faith.
Demons/devils believe there IS one God but they don’t believe IN or ON that one God. Huge difference.
>>So, holiness is a condition to perfection.<<
It’s Christ’s holiness we are covered with not any holiness of our own.
Galatians 2:20: Paul speaks of himself and all true Christians: "I have been crucified with Christ; it is no longer I who live, but Christ lives in me."
It’s not “our” faith but Christ’s faith in us that we live.
But of him are ye in Christ Jesus, who of God is made unto us wisdom, and righteousness, and sanctification, and redemption: That, according as it is written, He that glorieth, let him glory in the Lord. (1 Corinthians 1:30-31)
And be found in him, not having mine own righteousness, which is of the law, but that which is through the faith of Christ, the righteousness which is of God by faith: (Philippians 3:9)
It’s not our faith or righteousness but Christ’s faith and righteousness working through us that is ours when we believe on Him. How could we be more prefect than the perfection of Christ in us? Through the gift of grace that is how the Father sees us.