If our salvation is eternally secure, why does the Bible warn so strongly against apostasy?

Answered from the commentary of Frederick W. Grant, C. H. Mackintosh, An Outline of Sound Words and 6 others

Eternal security does not make the warnings needless: they are solemn and necessary, because professing Christians may abandon Christ, and giving Him up leaves no other ground of salvation. The authors most often distinguish such apostasy from a true believer’s failure or backsliding: they say the apostate had outward privileges and knowledge, but no living faith or eternal life. The warnings test profession and expose whether faith is real, since continuance in the faith is evidence of life.

They also warn believers because the way is difficult, the flesh tends to depart, and we need keeping; the warnings call for watchfulness, faith, and dependence on God’s preserving power. Some passages press the danger on believers in their responsible walk, while others emphasize that a true believer cannot apostatize or perish; they do not teach that eternal life can be lost. Thus the warnings are not empty: they guard against departure, stir faith to persevere, and leave apostasy as a fatal end for those whose profession was not living faith.

Verses: Hebrews 6:4, Hebrews 6:5, Hebrews 6:6, Hebrews 10:26, Hebrews 10:27, Hebrews 10:28, Hebrews 10:29, Hebrews 10:30, Hebrews 10:31, 2 Peter 2:20, 2 Peter 2:21, 2 Peter 2:22, Matthew 24:9, Matthew 24:10, Matthew 24:11, Matthew 24:12, Matthew 24:13, 1 Timothy 4:1, 2 Thessalonians 2:3, 1 Timothy 1:19, 1 Timothy 1:20, 1 Corinthians 10:1, 1 Corinthians 10:2, 1 Corinthians 10:3, 1 Corinthians 10:4, 1 Corinthians 10:5, 1 Corinthians 10:6, 1 Corinthians 10:7, 1 Corinthians 10:8, 1 Corinthians 10:9, 1 Corinthians 10:10, 1 Corinthians 10:11, 1 Corinthians 10:12, John 15:1, John 15:2, John 15:3, John 15:4, John 15:5, John 15:6, Romans 11:20, Romans 11:21, Romans 11:22, Jude 1:5, Luke 8:13, Hebrews 3:12, Hebrews 3:13, Hebrews 3:14, Colossians 1:21, Colossians 1:22, Colossians 1:23, 2 Timothy 2:11, 2 Timothy 2:12, 2 Timothy 2:13, John 10:27, John 10:28, John 10:29, Romans 8:35, Romans 8:36, Romans 8:37, Romans 8:38, Romans 8:39, Philippians 1:6, 1 Peter 1:3, 1 Peter 1:4, 1 Peter 1:5

The above is AI generated summary based on the writers below.

What the commentators say

The passages the answer is drawn from, the most direct first, with the words that bear on the question marked.

The Bible TreasuryThe Declared Purpose, and Present Moral Processes

The word of God assures eternal life to every believer on the Lord Jesus Christ; not a question of attaining eternal life after he believes, but a free and absolute gift at the moment. On the other hand the same word contains warnings, promises, and exhortations as if our salvation depended upon our own diligence. We know that there is a blessed and divine connection between the assurance and the warning. The Word of God is perfect. To sever the one from the other, because of human inability to grasp both, has not only divided believers into two opposing schools — and this is the lesser evil — but it has opposed one part of God's truth to another. This is not faith; in its root it is infidelity. The result is that those who are simply occupied with one side of the truth have evolved principles which are contrary to the plainest statements. For if because of the warning to believers it is inferred that a soul horn of God may after all be lost, what becomes of the assurance of eternal life? If on the other hand because life is eternal, this certainty is used to lessen, if not to deny, the sense of responsibility, then the solemn word of warning is practically set aside, that "without holiness no man shall see the Lord." So evident is it, that not a word can be omitted, added, or displaced, without marring the truth and injuring our own souls. The simple bow to the whole truth, and to such God gives unshaken faith.

The Bible TreasuryThe Declared Purpose, and Present Moral Processes

The word of God assures eternal life to every believer in the Lord Jesus Christ; not a question of attaining eternal life after he believes, but a free and absolute gift at the moment. On the other hand the same word contains warnings, promises and exhortations, as if our salvation depended upon our own diligence. We know that there is a blessed and divine connection between the assurance and the warning. The Word of God is perfect. To sever the one from the other, because of human inability to grasp both, has not only divided believers into two opposing schools — and this is the lesser evil — but it has opposed one part of God's truth to another. This is not faith; in its root it is infidelity. The result is that those who are simply occupied with one side of the truth have evolved principles which are contrary to the plainest statements. For if because of the warnings to believers it is inferred that a soul born of God may after all be lost, what becomes of the assurance of eternal life? If on the other hand because life is eternal, this certainty is used to lessen, if net to deny, the sense of responsibility, then the solemn word of warning is practically set aside, that "without holiness no man shall see the Lord." So evident is it, that not a word can be omitted, added, or displaced, without marring the truth and injuring our own souls. The simple bow to the whole truth, and to such God gives unshaken faith.

VariousNotes and Reflections on the Epistle to the Hebrews

It is certain that no soul that God has quickened unto life eternal can ever abdicate its title of salvation by a deliberate repudiation of the cross. The power which begets the children is pledged in Christ to their eternal preservation. No sheep of Christ will ever perish, because He is competent to save His flock. Nor is it possible that one alive to God should ever heartily despise His grace. Yet is it well that warning should be added to instruction. For it is thus that our feet keep practically the sure ways of life. No Christian is exempt from the danger of a large departure from the truth of God, although he is kept from drawing back unto perdition by His faithfulness who has otherwise appointed him (1 Thess. 5:9). If faith and patience be not kept in exercise by a continual minding of the things of Christ, it will soon be forgotten by the negligent believer that the friendship of the world is enmity with God. God's Holy Spirit will be grieved in those whom He has sealed, if He be not hearkened to with diligence as the alone Conductor of the children through the present evil world.

James BoydThe Salvation of the Soul

T. Believers have to be kept. And it is by the power of God they are kept. But it is through faith, which keeps the unseen things in view so that they become more real to the soul than things visible; and it is the visible things that are our real danger, for we are so ready to settle down in them, and give up as an object of faith that to which we have been called. There is always danger on our side, not on the side of God’s care and unfailing grace. Had Peter had a better knowledge of himself, he would have hearkened to the warning of the Lord, and his fall might have been avoided. But on the Lord’s side—“I have prayed for thee, that thy faith fail not”—secures the restoration of the self-confident disciple. Then again, as I have said, the Epistle being written to the profession, the possibility of there being a mixed multitude in that profession has to be considered. Ifs are found in all the Epistles, except Ephesians. There we could not have an “if,” for we are seated in the heavenly places. That Epistle, concerning itself with the counsels of God, shuts out the possibility of apostasy from Christ on account of the difficulties of the pathway. In Romans 11 we read, “If God spared not the natural branches, take heed lest He also spare not thee.” In 1 Corinthians 11 we have, “Wherefore let him that thinks he stands take heed lest he fall.” In Galatians 4:11, we read, “I am afraid of you, lest I have bestowed upon you labour in vain.” In Colossians 1:23, “If ye continue in the faith grounded and settled, and be not moved away from the hope of the gospel.” But I need not quote more passages of Scripture. These will suffice to show that the warnings of Scripture are not inconsistent with the assurance ministered to those who profess Christ as partakers of the blessings of the gospel.

Frederick W. GrantDivision 2

There is no need, for our present purpose, of discussing the "ifs" which come in, in all such warnings as that we are considering. They are the testing of profession, under which the true and the false alike come necessarily; they are needed to distinguish between them; and God uses them to exercise His own also: for we have in us the flesh still, and therefore those tendencies to departure from God, which make His constant grace absolutely needful. But, as has been often said, they are not warnings against too much faith, or too simple faith, but the reverse, and to persevere in joyful confidence to the end. All through this epistle (where the substance which is replacing the shadows is yet invisible) faith is the great necessity. It is as much emphasized for the life, as it is in the Roman and Galatian epistles as the ground of our acceptance.

The Christian's FriendNotes of Readings on 1 Corinthians

245 You have the two things in John 10: "They shall never perish," inwardly, nor be "plucked out of my hand." But this is not to weaken the plain positive passages which are given as warning, and meant to be as warning. We have the "ifs" in Hebrews, and in Colossians 1, "if ye continue," and so on. Now I suppose I believe that God is keeping His saints, and still I say to you, "If you continue to the end you will be saved." A methodist thinks and will say the same, but he thinks such an one might be lost after all; while I am perfectly certain that he will never perish, that is, if he really has life at all.

J. N. DarbyNotes of Readings on 1 Corinthians

245 You have the two things in John 10: "They shall never perish," inwardly, nor be "plucked out of my hand." But this is not to weaken the plain positive passages which are given as warning, and meant to be as warning. We have the "ifs" in Hebrews, and in Colossians 1, "if ye continue," and so on. Now I suppose I believe that God is keeping His saints, and still I say to you, "If you continue to the end you will be saved." A methodist thinks and will say the same, but he thinks such an one might be lost after all; while I am perfectly certain that he will never perish, that is, if he really has life at all.

The Christian's FriendReadings on 1 Corinthians

A. Always in Philippians salvation is looked at as with glory at the end. It was not the mere salvation of Paul's body in chapter 1:19. We always have that truth in that epistle founded on redemption; the cross has laid hold of me for the glory, but I have not yet laid hold of it, and what I ought to apprehend is that for which I have been apprehended. And God's way was when He laid hold of Paul to put him through the wilderness, and make him work out his salvation to the end. When I say God is keeping His people, I ask too, Why has He got to keep them? Because they want keeping, or they would fall. You have the two things in John 10: "They shall never perish" inwardly, nor be "plucked out of my hand." But this is not to weaken the plain positive passages which are given as warning, and meant to be as warning. You get the "ifs" in Hebrews and in Colossians 1: "If ye continue," and so on. Now suppose I believe that God is keeping His saints, and still I say to you, "If you continue to the end you will be saved." I get a Methodist who thinks and will say the same, but he thinks such an one might be lost after all, while I am perfectly certain that he will never perish, that is if he really has life at all.

The Christian's FriendNotes of Readings on 1 Corinthians

It is a great thing never to twist a single text of scripture to a doctrine. God is wiser than we are, and He has made no mistakes. I see people afraid of certain texts about certain doctrines, and I feel, therefore, that doctrine is not a settled thing with them. It is the same in effect in Romans: "Destroy not him with thy meat for whom Christ died" - destroy my brother for a bit of meat! The moment I see that the end of these things is death, and I am making my brother do one of them, it is plain at once that I am destroying my brother, and God's act to him would be in spite of me. It is quite true, that the moment I look at a believer in Christ, there is no "if," nor can be, as to his security; he is accepted in the Beloved, and there is no "if anything"; he is sitting in the heavenly places in Christ, and the whole matter is settled; but that is not all that God has chosen to do about him. He has chosen to put him through the wilderness when he has redeemed Him, and then we have "ifs" and "whens" without end: "If ye hold fast," in Hebrews; "If ye continue," in Colossians, and so on. But what we have along with it is, absolute dependence upon Another, and infallible faithfulness in Another. As I have sometimes said, I may be standing with my child on the top of a rocky precipice, and he is apt to run about foolishly, and I say to him, "If you tumble over, you will be smashed to atoms"; but I have not the slightest idea of leaving my hold of him, or of letting him fall. Now we are kept by the power of God through faith unto salvation. This shews we need to be kept; but on our side it is dependence on the power that does keep. You cannot confuse that with acceptance; but it is constant dependence upon God keeps my soul in a right state towards Him.

J. N. DarbyNotes of Readings on 1 Corinthians

It is a great thing never to twist a single text of scripture to a doctrine. God is wiser than we are, and He has made no mistakes. I see people afraid of certain texts about certain doctrines, and I feel, therefore, that doctrine is not a settled thing with them. It is the same in effect in Romans: "Destroy not him with thy meat for whom Christ died" - destroy my brother for a bit of meat! The moment I see that the end of these things is death, and I am making my brother do one of them, it is plain at once that I am destroying my brother, and God's act to him would be in spite of me. It is quite true, that the moment I look at a believer in Christ, there is no "if," nor can be, as to his security; he is accepted in the Beloved, and there is no "if anything"; he is sitting in the heavenly places in Christ, and the whole matter is settled; but that is not all that God has chosen to do about him. He has chosen to put him through the wilderness when he has redeemed Him, and then we have "ifs" and "whens" without end: "If ye hold fast," in Hebrews; "If ye continue," in Colossians, and so on. But what we have along with it is, absolute dependence upon Another, and infallible faithfulness in Another. As I have sometimes said, I may be standing with my child on the top of a rocky precipice, and he is apt to run about foolishly, and I say to him, "If you tumble over, you will be smashed to atoms"; but I have not the slightest idea of leaving my hold of him, or of letting him fall. Now we are kept by the power of God through faith unto salvation. This shews we need to be kept; but on our side it is dependence on the power that does keep. You cannot confuse that with acceptance; but it is constant dependence upon God keeps my soul in a right state towards Him.

Verses

  • Hebrews 6:4–64For it is impossible to renew again to repentance those once enlightened, and who have tasted of the heavenly gift, and have been made partakers of [the] Holy Spirit, 5and have tasted the good word of God, and [the] works of power of [the] age to come, 6and have fallen away, crucifying for themselves [as they do] the Son of God, and making a show of [him].
  • Hebrews 10:26–3126For where we sin wilfully after receiving the knowledge of the truth, there no longer remains any sacrifice for sins, 27but a certain fearful expectation of judgment, and heat of fire about to devour the adversaries. 28Any one that has disregarded Moses' law dies without mercy on [the testimony of] two or three witnesses 29of how much worse punishment, think ye, shall he be judged worthy who has trodden under foot the Son of God, and esteemed the blood of the covenant, whereby he has been sanctified, common, and has insulted the Spirit of grace? 30For we know him that said, To me [belongs] vengeance; I will recompense, saith the Lord and again, The Lord shall judge his people. 31[It is] a fearful thing falling into [the] hands of [the] living God.