Many are the ways in which the mere professor is snared and taken, and while all are exposed to the wiles of the adversary, only those who have life finally escape them. All the scriptures that warn, and call to diligence lest we fail and come short of His grace, are tests applied to each professor, and make manifest his true condition according as he pays heed to them, or is careless. For each one in whom the Spirit dwells does give diligence that, he fail not of the grace of God. I speak of the habit, not of slips and failures, but as John says “whosoever has been begotten of God doth not practice sins” (1 John 3:9). The absolute certainty of the believer's salvation is in the purpose of God, and one part of the purpose is holiness, and grace accomplishes it in us. See Rom. 8:28-30 as to the purpose: where more absolutely and unconditionally expressed? This purpose was made before the world was created, Foreknown, then predestinated to be conformed to the image of His Son; then after being born in this world, at the right moment called; and so entirely is the responsibility side of the believer's life excluded from this scripture that the complete and full purpose of God is summed up just as if then accomplished, “Whom He called them He also justified, and whom He justified them He also glorified.” Our names were written in the book of life before the foundation of the world.
Can any such fail to enter into the rest of God? Can any such fail of the very place marked out for them in the coming glory? When our names were written in His book of life, was not our precise portion in the kingdom and glory also predetermined? Yea, all was included in His purpose. And the real question is, not whether we may fail to enter into our pre-appointed place, but does God fail in carrying out His purpose.? Is nature stronger than grace? The will of sin mightier than the will of God? Nay, with those that are called according to His purpose, where sin abounded grace does much more abound. Were it possible to be otherwise there would be an impeachment of the value of Christ's blood, of the sovereignty of grace. Blessed be God, this is not possible. Every true believer will be, yea must be, brought through every trial, a victor over every foe. God's purpose is published, is proclaimed to the whole world, His immutable counsel confirmed by an oath, “That by two immutable things in which it was impossible for God to lie, we might have a strong consolation, who have fled to refuge to lay hold upon the hope set before us.”
But recurring to the question, if our salvation is so eternally secure, why these warnings and admonitions as if our entry into heaven depended upon our own exertions and watchfulness? Because the flesh, the opposing principle to God, is in us; and it is ours to overcome and judge it by a power outside of ourselves. We should not have known what dreadful evil was in us, had we not been warned. Therefore the warning, the admonition, is for those who have faith, not anything to suggest a fear of final failure and loss, but a gracious intimation of where our danger lies, that we may not be suddenly overtaken in a fault, and, so watching, we are—so to say—forearmed against our enemy. To a heart that responds ever so feebly to God's love, what greater grief could be than that God should have no pleasure in him? what greater motive than this to keep him diligent in the ways and life of faith, that he never draw back? This is the constant tendency of nature, and we find that our most treacherous foe is ever present with us. God could have annihilated our old nature when we believed, and then we should have had no flesh to contend against. It is because we are constantly beset by this foe that God Himself works in us, or we should soon be overcome, and also because He would give us a reward that He bids us work out our salvation with fear and trembling. Without this principle of sin within, God would still have worked in us to will and to do of His good pleasure—for there is no power in the new nature, it is capable of producing good, but the power is in the Spirit—but there would have been no reason for fear and trembling. It was simply a question of God's will. Is it then a mark of favor and love that believers here should be called to work out their salvation with fear and trembling? Yea, assuredly, for God's purpose is not only to save, but also to give us a crown of victory. Victory implies previous conflict. If there were no flesh to fear and judge, no world to overcome, no devil to resist, there would be no fighting, no victory, and no crown. The fear and trembling arise from the fact that our own nature is in league with the world and its prince. Hence the warnings, and the necessity of constant watching against the workings of nature—i.e., the old flesh, which always lusts against the Spirit. Hence the continuous conflict with the flesh. Neither the world nor its prince can harm us save through our own flesh. Therefore God says “Work out your own salvation with fear and trembling.” But eternal life is ours, the victory is assured, and we fight, not as one that beateth the air—not vainly struggling, but as well knowing what and where the danger is, and watching with jealous care.
To ensure the victory, which as to our daily walk and experience is a moral victory, God works in us first to will. The will being created in us, then God gives power to do. If the believer were simply an unintelligent machine, there might still be the doing, but where would be the willing? Who thinks of a will in a steam engine? The Father is seeking worshippers who shall offer intelligent praise. There is creation praise in Psa. 148. We who know in Whom we have redemption give a willing praise, and yield a willing obedience. Truly it is God who creates the will and gives the ability to do. But it is also our will. God works, and we will and we do.