A key strategy in effective apologetics is building a cumulative case—using multiple lines of evidence that reinforce one another while remaining capable of standing on their own. Together, they form a strong overall case. But each individual point should also be clear and compelling enough to challenge an opposing argument when considered on its own.
Ready Responses are designed with this approach in mind. Each response is a concise, memorable Truth Bullet—a key fact, question, or line of reasoning you can introduce into a conversation. You don’t need to deliver an entire argument at once. Sometimes one well-placed truth is enough to challenge an assumption, expose a weakness, or give someone a reason to reconsider what they believe.
Skeptics often raise difficult questions about creation, the universe, God, and the Bible. Ready Responses gives you concise answers, memorable Truth Bullets, key Scriptures or Quotes to help you understand the issue and explain what you believe in your own words.
Purpose: You don’t need to memorize an argument. Learn the key ideas well enough to explain them in your own words.
Why Does Every Human Have a Conscience?
Response
Across cultures and throughout history, human beings possess an inner awareness that some things are right and others are wrong.
We don’t merely recognize consequences. We experience moral obligation—the conviction that there are things we ought to do and things we ought not to do.
Our conscience can produce guilt even when no one knows what we’ve done. It can compel us to tell the truth when lying would benefit us, make restitution when we could easily get away with wrongdoing, or sacrifice our own interests for the good of someone else. These moral impulses can run directly against our immediate instincts for self-preservation and personal advantage.
And this moral awareness is remarkably widespread. Across cultures, actions such as murder, stealing, cowardice, adultery, betrayal, and the mistreatment of the weak and vulnerable have generally been regarded as wrong, while courage, honesty, loyalty, justice, and compassion have been honored as virtues.
The question is: Why do human beings possess this persistent sense that some things are not merely advantageous or disadvantageous—but actually right or wrong?
Christianity provides a straightforward explanation:
God has written His moral law on the human heart.
Our conscience is not merely an instinct for survival. It is an internal moral witness reflecting the character of the God who created us in His image.
Truth Bullet
- If there is an objective moral law, there must be a standard beyond human opinion by which right and wrong are measured.
If something can be truly wrong even when a person—or an entire society—believes it is right, then morality must come from a standard higher than human opinion.
Helpful Memory Verse
“They show that the work of the law is written on their hearts, while their conscience also bears witness.”
Romans 2:15
Challenge Question: If conscience is simply the product of natural selection, why do we feel morally obligated to do what is right even when doing so provides no survival advantage—or may actually cost us something?
Where Does Objective Right and Wrong Come From?
Response
People disagree about many moral questions, but disagreement doesn’t mean that objective moral truth doesn’t exist.
Consider deliberately torturing an innocent child for enjoyment.
We don’t merely say, “I personally dislike that.”
We recognize:
That is wrong.
And it would remain wrong even if an individual, culture, or government decided otherwise.
But that raises an important question:
What makes it objectively wrong?
If morality is ultimately created by individuals, then morality becomes personal preference.
If society creates morality, then no society could ever be objectively wrong—only different.
If evolution creates morality because certain behaviors help us survive, that may help explain why we behave certain ways, but it does not establish why we are morally obligated to behave that way.
Christianity grounds objective morality in the unchanging character of God.
Truth Bullet
If there is an objective moral law, there must be a standard beyond human opinion by which right and wrong are measured.
Helpful Quote
A man does not call a line crooked unless he has some idea of a straight line.
C.S Lewis
Challenge Question: If there is no moral standard above individuals and societies, on what basis could we ever say that an entire society was morally wrong?
Can Evolution Explain Why We Ought to Be Good?
Response:
An evolutionary explanation might attempt to explain why cooperation, loyalty, or altruistic behavior could help a population survive.
But there’s an important distinction between explaining why a behavior developed and explaining why that behavior is morally right.
Survival tells us what helps organisms continue living.
It doesn’t tell us why survival itself is good, why sacrificing yourself for another person is noble, or why exploiting someone for your own advantage is wrong.
This is the difference between “is” and “ought.”
Nature can describe what is.
Moral obligation tells us what we ought to do.
Christianity explains that obligation by grounding morality in a personal Moral Lawgiver whose character provides the objective standard of good. Your ThinkCube makes this same distinction in its discussion of evolutionary explanations for morality.
Truth Bullet
- Survival can explain usefulness. It cannot establish moral obligation.
Helpful Quote
How does one determine whether a law is just or unjust? A just law is a man-made code that squares with the moral law.
William Lane Craig
Challenge Question: If morality developed only because certain behaviors helped our ancestors survive, how do we explain the countless examples of people willingly sacrificing their own safety—and sometimes their lives—to save complete strangers?
Why Do We Feel Guilty When Nobody Knows?
One of the most interesting features of conscience is that it operates even when there are no external consequences.
A person can lie, cheat, steal, betray someone, or commit another wrongdoing without being discovered—and still experience guilt.
There may be no punishment.
No loss of reputation.
No threat to survival.
Nobody else may ever know.
But we know.
That inner accusation is exactly what the Bible describes when it says our conscience either accuses or defends us.
From the Christian perspective, guilt makes sense because human beings aren’t merely accountable to society.
We ultimately recognize accountability to a moral standard above ourselves.
Truth Bullet
Conscience can accuse us even when no one else knows what we’ve done.
Helpful Verse
“Their conscience also bears witness, and their conflicting thoughts accuse or even excuse them.”
Romans 2:15
Challenge Question: If morality exists only to regulate social behavior, why can we experience profound guilt for something no other person knows we did?