Islam Gives Assurance Through Deeds and Mercy

Concede the legitimate worry first: a faith that never lets anything new be said can calcify into mere traditionalism. But that is not what is at stake here. The New Testament does not describe the gospel as an evolving conversation. It describes it as a deposit: something received, entrusted, and to be guarded intact.

Jude makes the point in a single phrase: “the faith which was once delivered unto the saints.” The word translated “once” means once-for-all, not once-upon-a-time. Paul tells Timothy to “hold fast the form of sound words” and to “keep” the “good thing which was committed unto thee.” The posture toward the apostolic gospel is custodial: you do not improve a deposit, you protect it.

This is why the question to ask of any later movement is not whether it is sincere, growing, or spiritually moving, but whether its message is the same gospel the apostles delivered: the gospel Paul says he received and passed on, “how that Christ died for our sins according to the scriptures… and that he rose again the third day.”

Paul anticipates the very move later claims rely on. He does not say “reject any rival preacher because he is less credentialed than I am.” He says the opposite: “though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.” He stakes the test on content, not credentials, and he disqualifies even himself and even an angel if the message changes.

That is decisive for how to weigh an impressive origin story. A recovered set of plates, a recited revelation of surpassing beauty, an angelic messenger: none of these is the criterion. The criterion is whether the resulting gospel agrees with the one already given. A book offered as another testament alongside the Bible, or a message claiming to restore truths the church supposedly lost, must be measured by that standard, however moving its arrival. The argument over the testing framework itself sets this out in full. Here the point is narrower and sharper: even heaven’s own angel would not be exempt.

Not every disagreement changes the gospel. People can differ on church order, prophecy, and a hundred secondary matters while preaching the same good news. So it matters to name what cannot move: the basis of salvation.

Paul draws the line at grace. “By grace are ye saved through faith; and that not of yourselves: it is the gift of God: not of works, lest any man should boast.” He puts the stakes starkly: “if righteousness come by the law, then Christ is dead in vain.” A message that leaves the words grace, Christ, and faith in place but relocates final salvation onto human merit, ritual attainment, or a ladder of exaltation earned by works has not added detail to the gospel. It has swapped out its foundation. That is precisely the kind of change Paul calls “another gospel.”

The strongest objection is not that the apostles were unimpressive but that finality is arbitrary: God spoke progressively through Moses and then the prophets, so why assume the installments end with the apostles? Isn’t “no more revelation” just a door slammed to protect the status quo, the same instinct that, the claim goes, drove the church to lose plain and precious truths?

The answer is that the finality is not arbitrary; it is built into how the story was always told.

• The progression had a goal, not just a sequence. Hebrews says God spoke “at sundry times and in divers manners” through the prophets, but “in these last days” has spoken “by his Son.” The prophets were not stages awaiting a further prophet; they pointed forward to the Son, who is the terminus. “Last days” speech in the Son is not one more installment. It is the arrival of what the installments anticipated.
• After the Son, the posture changes. Once the goal has come, the New Testament never tells believers to await the next prophet; it tells them to guard what was delivered. The category shifts from reception to custody.
• The corruption escape hatch must be argued, not assumed. Claiming the gospel was so lost that a new revelation was required is a historical claim with a historical answer, taken up under the great-apostasy objection and the reliability of the New Testament. It cannot simply be presupposed to make room for a later message.

So rejecting a contrary gospel is not fear of God speaking again. It is taking seriously that God has spoken his final word in the Son, and that the faith built on that word was delivered to the saints once for all.

The moral argument is constantly misheard, so state it precisely. It does not claim that unbelievers cannot be good, cannot tell right from wrong, or cannot raise decent families. They plainly can and do. The argument is not about moral knowledge (how we come to recognize right and wrong) or moral practice (whether we live up to it). It is about moral ontology: what reality grounds genuinely binding moral obligations in the first place.

The Stanford Encyclopedia survey describes this whole family of arguments as reasoning from some feature of morality to God as its best explanation. The Christian is not insisting that atheists have no morals; he is pressing a question the atheist must also answer: when you say an act is truly wrong, not just unfashionable or forbidden by your tribe, what makes that true?

Two features of moral life resist easy reduction.

The first is binding obligation. Most people, on reflection, hold that torturing a child for entertainment is not just distasteful or socially counterproductive but really, mind-independently wrong, even if every society came to approve of it. That is a claim about how things are, not about how we happen to feel. A standard form of the argument grants exactly this: there are objective moral facts, and then asks what best explains them.

The second is human worth. We treat persons as having a dignity that does not rise and fall with their usefulness, their power, or the consensus around them. The weak, the unborn, the enemy, and the prisoner each retain a worth that forbids certain treatment. But if a human being is finally just rearranged matter, naturalism has no stable ground for that non-negotiable worth. Christianity grounds it in persons being made in the image of God: a dignity conferred by the Creator, not earned by achievement or assigned by society.

The unbeliever has real answers here, and they deserve real engagement rather than caricature.

• Morality is an evolved instinct. Very likely our moral feelings did emerge through evolution. But that explains the feeling, not the obligation. If “do not betray your friend” reduces to a useful impulse inherited from our ancestors, then in the cases where betrayal would actually pay, the impulse carries no authority to bind me. Explaining why we have moral sentiments is not the same as showing those sentiments answer to anything true.
• Morality is a social contract. Useful, but it makes the majority the measure. A society that agreed to exterminate a minority would, on this view, be doing nothing objectively wrong; only something others dislike. Almost no one truly believes that. The reformer who stands against his entire culture is often right against the consensus, which means the consensus was never the standard.
• Moral facts simply exist, with no God. This is the most serious option: a non-theistic moral realism on which values are real, abstract features of reality. It should be weighed honestly. But it fails to explain how an abstract value obligates a person or issues anything resembling a command. The atheist philosopher J. L. Mackie felt this so acutely that he judged objective moral facts would be metaphysically “queer,” too strange to fit a purely physical world, and so denied they exist at all. That is consistent, but notice the cost: moral outrage at real evil becomes, strictly, a useful illusion. Theism lets us keep the conviction that some things are really wrong.

The classic counter is the Euthyphro dilemma: is something good because God commands it (then goodness is arbitrary; he could have commanded cruelty) or does God command it because it is good (then goodness stands above God, and we never needed him)?

The Christian answer declines both horns. Goodness is neither an arbitrary divine decree nor a standard hovering above God; it is grounded in God’s own necessary and unchanging character. He does not consult an external rule of love and justice, nor invent one on a whim. He is love and justice, and his commands express what he is. Cruelty was never a live option, because it contradicts his nature.

Here the argument turns pastoral. The same moral law that lets us name evil for what it is also turns and indicts us, which is the honest weight underneath every appeal to the problem of evil. If there is a real moral law, we have all broken it. Christianity does not flinch from that verdict; it answers it with a cross. The God who grounds the law is the God who bore its penalty.