Sin Affects Everything

The Corruption of Our Whole Nature and the Hope of the Gospel

Currently our men’s group is studying Dr. Rob Pacienza’s short book, How Firm a Foundation: Eight Truths for an Unshakeable Faith. In the fifth chapter he tackles the Problem of Sin. One of his opening statements is a well-familiar truth. He writes, sin has touched every aspect of human existence.¹ This is a succinct way of describing what our standards teach more fully and what is often called total depravity. Yet, in today’s evangelical world, this doctrine is frequently misunderstood, softened, or ignored altogether.

However, if we are to rightly understand the gospel, we must first rightly understand the depth of our need.

What Do We Mean?

The Westminster Larger Catechism provides remarkable clarity here. In Westminster Larger Catechism Question 25, we are reminded that the sinfulness of our estate consists in “the guilt of Adam’s first sin, the want of original righteousness, and the corruption of his whole nature.”

That final phrase, “the corruption of his whole nature,” is key. We do not suffer from a partial immorality nor is it isolated to one aspect; it is comprehensive.

Questions 26–28 unfold this further, stating, that through Adam’s fall, all mankind is brought into a state of sin and misery and under God’s wrath, subject to death, and inclined toward all evil. Question 27 speaks of that corruption being conveyed to all our posterity, and question 28 catalogs the miseries that flow from this fallen condition both in this life and in that which is to come.

Then Questions 29–30 begin to turn our eyes toward the hope that God has not left mankind to perish in this estate but has provided a Redeemer.

But before we rush to the gospel, we must linger at the weightiness of sin.

A Corruption That Reaches Everywhere

To say that sin has touched every aspect of human existence is to say that there is no faculty of our being left untouched by the fall. The Scriptures speak to this comprehensively, and our own experience confirms it.

The Mind

Sin affects how we think. Paul writes that the Gentiles “walk…in the futility of their minds. They are darkened in their understanding” (Eph. 4:17–18). Likewise, Romans 1:21 tells us that although men knew God, “they did not honor him as God… but became futile in their thinking.”

This means we do not naturally perceive truth rightly. Our reasoning is not neutral, as many like to believe, it is bent toward wickedness.

Practically, this means that we are good at justifying sin with “sophisticated arguments,” we reinterpret clear biblical teaching to fit cultural norms, and we suppress uncomfortable truths rather than submit to them.

A man may convince himself that his anger is “righteous,” his greed and discontent is “ambition,” or his compromise is “wisdom.” The mind, touched by sin, becomes an accomplice to it.

The Heart

Sin affects what we love. “The heart is deceitful above all things, and desperately sick” (Jer. 17:9). Jesus teaches that “out of the heart come evil thoughts, murder, adultery, sexual immorality…” (Matt. 15:19). Our problem is not merely external behavior, but also our internal desire.

We crave approval from others more than faithfulness to God. We love comfort more than obedience. We envy rather than give thanks.

Even our “good deeds” can be motivated by pride, fear of man, or desire for recognition. The heart does not simply need correction, it needs renewal.

The Will

Sin affects what we choose. Jesus says plainly, “Everyone who practices sin is a slave to sin” (John 8:34). Paul echoes this: when he writes that we were “by nature children of wrath” (Eph. 2:3) and “dead in…trespasses and sins” (Eph. 2:1).

We are not coerced into sin, but choose it. Furthermore, we choose it because our will is inclined toward it.

Have you ever noticed that we often return to the same sins even after resolving to stop? What about how we delay repentance, assuming there will always be time? How many times have we neglected the ordinary means of grace, not because we don’t have access to them, but because we choose not to?

The Body

Sin affects even our physical existence. “Through one man sin entered the world, and death through sin” (Rom. 5:12). Paul speaks of the body as capable of being presented “as instruments for unrighteousness” (Rom. 6:13).

Our bodies are fallen and corrupted by the consequences of sin. Physical appetites can dominate us leading to gluttony and lust. We experience sickness, fatigue, decay, and death. Addictions reveal how deeply sin can entangle both body and soul.

Even our mortality is a testimony that sin has reached into our very flesh.

Relationships

Sin affects how we relate to others. Immediately after the fall, Adam blames Eve (Gen. 3:12), and Cain rises against Abel (Gen. 4:8). James later explains, “What causes quarrels and what causes fights among you? Is it not this, that your passions are at war within you?” (James 4:1).

Our marriages are strained by selfishness and pride. Our children grow frustrated even in moments of helpful correction. Friendships are broken by betrayal or envy. Churches experience conflict between members, staff, and pastoral relationships.

Where there should be harmony, there is division all because sin has corrupted the heart.

Society

Sin’s reach extends beyond individuals into the fabric of society. Isaiah pronounces woe on those “who call evil good and good evil” (Isa. 5:20). What Theo Hobson describes in moral revolutions is simply the outworking of this reality at a cultural level.

Institutions, nations, and systems relfect the fallen nature of the people within them. Moral standards are inverted, justice becomes unfair, partial, selective, and politicized. Truth is treated as subjective rather than objective.

Worship

Sin affects even how we approach God. Of course, we affirm that sin has created enmity between God and man. That also means, as Paul writes in Romans 1:23, that we have exchanged “the glory of the immortal God for images.” Evenmore, often when worship is directed toward the true God, it can be shaped more by human preference than divine command.

When worship becomes entertainment rather than reverence, we have exchanged worshipping God in truth with a lie. When God is spoken of in ways that diminish His holiness and character, we sin and take his name in vain. When personal experience is elevated above Scripture, we distort what God has declared best.

The human heart is, as John Calvin famously said, “a perpetual factory of idols.”

Conscience

Even the conscience, though real and important, is affected by sin. Paul speaks of those whose consciences are “seared” (1 Tim. 4:2), while elsewhere he describes a “weak” conscience (1 Cor. 8:7).

I’m sure we know many who feel no guilt over serious sin, but we probably also know others who feel crushing guilt over matters where Scripture gives freedom. Because of sin, moral judgments become inconsistent or self-serving.

This means that the conscience is not, and cannot be, our ultimate authority. It must be informed and corrected by the Word of God.

The Weight of It All

When we step back, the picture is sobering. We do not think, love, choose, or live rightly. This is what the Westminster Larger Catechism means when it speaks of “the corruption of [our] whole nature.”

Sin touches everything. Therefore, salvation must reach just as deep.

We must be careful here. Total depravity does not mean that every person is as sinful as he could possibly be. Nor does it deny that man, as the image-bearer of God, can still perform outwardly good actions.

Rather, it means there is no part of us untouched by sin. Every faculty is corrupted, and therefore every part of us stands in need of redemption.

This is why moral reform alone is insufficient. We do not simply need better habits, but we stand in need of new hearts.

The Free Offer of the Gospel

Here is where the darkness gives way to light. The same catechism that diagnoses our condition does not leave us there. Westminster Larger Catechism Questions 29–30 remind us that God, out of His mere love and mercy, has provided a Redeemer, Jesus Christ, and freely offers Him in the gospel to sinners.

This is not a message for the morally improved. It is for those who recognize that sin has reached into every corner of their being.

Christ is held forth freely. He is not merely an example or a self-improvement coach. He is a Savior.

Scripture declares that He is the propitiation for our sins (1 Jn .2:2). He is the One who has satisfied the wrath of God that our sins deserved. Where we stood guilty, He stood condemned in our place. Where we were corrupt, He is perfectly righteous. Where we were dead, He gives life.

And this gospel is offered freely to all.

Not because we are worthy, but precisely because we are not.

If sin has touched every aspect of who we are, then we must not look within for the solution. We must look to Christ.

He alone can renew the mind.
He alone can reorder the heart.
He alone can free the will.
He alone can redeem the body.
He alone can reconcile us to God.

The doctrine of total depravity is not meant to leave us in despair, but to strip away false hope so that we might cling to the only true hope that is found in Jesus Christ, freely offered in the gospel.

1. Pacienza, Robert J. How Firm a Foundation: Eight Truths for an Unshakeable Faith. Fearn, Scotland: Christian Focus Publications, 2025. 73