Here is some food for thought. Believers must continue in the faith, finish the race, endure until the end, remain faithful etc…
1-They follow Jesus , John 10:27
2- Keep/obey His teachings, John 8:51
3- Faith is continual - believing the present active participle. John 5:24
4- Remaining faithful to His word/teaching John 8:31
A person can stop following Jesus and become lost, stop obeying Him and not continuing in the faith and enduring until the end and fall away just like Hebrews teaches and other N.T. passages and parables.
Ex 32:32- Yet now, if thou wilt forgive their sin; and if not, blot me, I pray thee, out of thy book which thou hast written
Ps 69:28-May they be blotted out of the book of life and not be listed with the righteous
See also Rev 3:5 and 22:19-
blotting out from the book of life.
Hebrews was written to believers who should be teachers by now as per Hebrews 5:12 who have need again of the basics and of milk. The Hebrew believers need the food of infants in Hebrews 5:13 who cannot stomach the food for the mature in Hebrews 5:14. Chapter 6 follows chapter 5. This book is filled with such warning passages as we read below :
" It is impossible for those who have once been enlightened, who have tasted the heavenly gift, who have shared in the Holy Spirit, 5 who have tasted the goodness of the word of God and the powers of the coming age 6 and who have fallen away, to be brought back to repentance. To their loss they are crucifying the Son of God all over again and subjecting him to public disgrace. 7 Land that drinks in the rain often falling on it and that produces a crop useful to those for whom it is farmed receives the blessing of God. 8 But land that produces thorns and thistles is worthless and is in danger of being cursed. In the end it will be burned. "
1-Only believers are enlightened
2-Only believers can taste the heavenly gift
3-Only believers can partake of the Holy Spirit
4-Only believers experience Gods power
5-Only believers can fall away
Hebrews 12
Therefore, since we are surrounded by such a great cloud of witnesses, let us throw off everything that hinders and the sin that so easily entangles. And let us run with perseverance the race marked out for us, 2 fixing our eyes on Jesus, the pioneer and perfecter of faith. For the joy set before him he endured the cross, scorning its shame, and sat down at the right hand of the throne of God. 3 Consider him who endured such opposition from sinners, so that you will not grow weary and lose heart.
God Disciplines His Children
4 In your struggle against sin, you have not yet resisted to the point of shedding your blood. 5 And have you completely forgotten this word of encouragement that addresses you as a father addresses his son? It says,
“My son, do not make light of the Lord’s discipline,
and do not lose heart when he rebukes you,
6
because the Lord disciplines the one he loves,
and he chastens everyone he accepts as his son.”
7 Endure hardship as discipline; God is treating you as his children. For what children are not disciplined by their father? 8 If you are not disciplined—and everyone undergoes discipline—then you are not legitimate, not true sons and daughters at all. 9 Moreover, we have all had human fathers who disciplined us and we respected them for it. How much more should we submit to the Father of spirits and live! 10 They disciplined us for a little while as they thought best; but God disciplines us for our good, in order that we may share in his holiness. 11
No discipline seems pleasant at the time, but painful. Later on, however, it produces a harvest of righteousness and peace for those who have been trained by it.
12 Therefore, strengthen your feeble arms and weak knees. 13 “Make level paths for your feet,” so that the lame may not be disabled, but rather healed.
Warning and Encouragement
14 Make every effort to live in peace with everyone and to be holy;
without holiness no one will see the Lord. 15 See to it that no one falls short of the grace of God and that no bitter root grows up to cause trouble and defile many. 16 See that no one is sexually immoral, or is godless like Esau, who for a single meal sold his inheritance rights as the oldest son. 17 Afterward, as you know, when he wanted to inherit this blessing, he was rejected. Even though he sought the blessing with tears, he could not change what he had done.
The Mountain of Fear and the Mountain of Joy
18 You have not come to a mountain that can be touched and that is burning with fire; to darkness, gloom and storm; 19 to a trumpet blast or to such a voice speaking words that those who heard it begged that no further word be spoken to them, 20 because they could not bear what was commanded: “If even an animal touches the mountain, it must be stoned to death.” 21 The sight was so terrifying that Moses said, “I am trembling with fear.”
22 But you have come to Mount Zion, to the city of the living God, the heavenly Jerusalem. You have come to thousands upon thousands of angels in joyful assembly, 23 to the church of the firstborn, whose names are written in heaven. You have come to God, the Judge of all, to the spirits of the righteous made perfect, 24 to Jesus the mediator of a new covenant, and to the sprinkled blood that speaks a better word than the blood of Abel.
25 See to it that you do not refuse him who speaks. If they did not escape when they refused him who warned them on earth, how much less will we, if we turn away from him who warns us from heaven? 26 At that time his voice shook the earth, but now he has promised, “Once more I will shake not only the earth but also the heavens. 27 The words “once more” indicate the removing of what can be shaken—that is, created things—so that what cannot be shaken may remain.
28 Therefore, since we are receiving a kingdom that cannot be shaken, let us be thankful, and so worship God acceptably with reverence and awe, 29
for our “God is a consuming fire.
James agrees
James 2:14-26
What good is it, my brothers and sisters, if someone claims to have faith but has no deeds? Can such faith save them? 15 Suppose a brother or a sister is without clothes and daily food. 16 If one of you says to them, “Go in peace; keep warm and well fed,” but does nothing about their physical needs, what good is it? 17 In the same way, faith by itself, if it is not accompanied by action, is dead.
18 But someone will say, “You have faith; I have deeds.”
Show me your faith without deeds, and I will show you my faith by my deeds. 19 You believe that there is one God. Good! Even the demons believe that—and shudder.
20 You foolish person, do you want evidence that faith without deeds is useless[
d]? 21 Was not our father Abraham considered righteous for what he did when he offered his son Isaac on the altar? 22 You see that his faith and his actions were working together, and his faith was made complete by what he did. 23 And the scripture was fulfilled that says, “Abraham believed God, and it was credited to him as righteousness,”[
e] and he was called God’s friend. 24 You see that a person is considered righteous by what they do and not by faith alone.
25 In the same way, was not even Rahab the prostitute considered righteous for what she did when she gave lodging to the spies and sent them off in a different direction? 26 As the body without the spirit is dead, so faith without deeds is dead.
hope this helps !!!