Good points ^above^ because as Jesus said [Matt 24v13] the one who endures to the end is the one who will be saved.
If you truly
possess saving faith, and not just
profess saving faith, you will not fall away in the trial of faith (Mk 4:16-17), but will endure to the end (Lk 8:15).
Those who fall away in the trial of faith never really
possessed saving faith.
Even Paul was concerned that he could end up a 'castaway' -1Cor 9v27
In
1 Co 9:24-27, Paul's concern was
not about loss of salvation, but loss of the
prize, or reward, or crown.
See
1 Co 3:8-15, where he discusses the
quality of one's work for Christ in
relation to the
reward (crown) one will receive. He says the quality of each man's work will be tested by fire, and if the work survives, he will receive his reward. But if his work is burned up, he will lose the reward. The person will be
saved, but he will suffer the loss of a reward (crown).
In 1 Co 9:27 Paul is not referring to losing his salvation, but to losing his reward (crown).
What would be the point of working out one's salvation with fear and trembling is one could not fall away? -Phil 2v12.
Good question.
The NT contains warnings (Php 2:12; Heb 6:4-6; 2 Pe 1:10).
One of the ways God
keeps us (Ro 8:38, Php 1:6, Heb 10:14) is through warnings to persevere.
True believers heed these warnings and do not fall away. They have little affect on those who do not truly believe.
The ones of Hebrews [6vs4-6] were Not once saved always saved.
If those Hebrews went back to Judaism like they were considering doing, they would be rejecting Christ's sacrifice for their sin, which meant there guilt remained on them, and there would be no other remedy to remit it. They would be sinning against the remedy and barring their own door to salvation from the wrath of God.
The true believers among them heard Paul's warning and were
kept from sinning against the remedy.
Those who were not true believers
manifested it by not being affected by Paul's warning.