Podcast Summary: "If Man Is Totally Depraved, Why Does Satan Blind Unbelievers?"

Ask Ligonier – April 2, 2026
Host: Nathan W. Bingham
Guest: Dr. Derek Thomas (Ligonier Teaching Fellow)

Episode Overview

This episode answers a listener-submitted question: If man is totally depraved, why does Satan blind unbelievers? The discussion explores the meaning and implications of total depravity, human responsibility, and the unique role Satan plays in reinforcing the condition of unbelief. Dr. Derek Thomas brings theological clarity to a challenging subject, grounding his discussion in Scripture and Reformed doctrine.

Key Discussion Points and Insights

1. Clarifying Total Depravity

Total depravity does not mean people are as bad as possible, but that every aspect of human nature is affected by sin.
"There is no aspect of [man's] being that isn't in some way tainted and marred by sin, and some more than others. So there are degrees of that total depravity in its effect upon the natural man." – Dr. Thomas [00:36]
The extent of depravity results in spiritual inability: humans cannot, on their own, choose to believe in Christ or do all the good required.

2. Human Responsibility and Free Agency

Even in depravity, humans remain “free agents,” though not possessing “free will” in the spiritual sense.
Everyday choices (what to eat, what to wear) illustrate human agency, but spiritual decisions lie beyond natural capacity.
"We've lost free will, but we are still free agents." – Dr. Thomas [02:01]

3. Satan’s Role: Deepening Blindness

Scripture portrays Satan as actively reinforcing and deepening the spiritual darkness of unbelievers.
"Satan works on the hearts and minds and wills and desires of the natural man... he deepens their blindness." – Dr. Thomas [02:29]
Satan blinds by capitalizing on and exacerbating existing sinfulness and unbelief.

4. The Analogy of Desecration

The process is compared to a corpse: "A corpse may be dead, but you can always desecrate that corpse." – Dr. Thomas [03:42]
Satan adds a further layer of spiritual darkness to those already spiritually dead.

5. Satan’s Motivations and Destiny

Dr. Thomas speculates on Satan's motivations: a hatred of God and companionship in darkness.
"He himself never seeks the light, but he wants the comfort of companions and followers... to confirm his blindness by the blindness of others." – Dr. Thomas [03:07]
Reminds listeners that Satan is not yet cast into outer darkness as described in Revelation 20; he is still active, "prowling about like a roaring lion". [04:12]

6. Application for Believers

Believers also face temptations from Satan, as seen in the biblical example of Peter.
Peter’s experience serves as a caution: even believers can fall prey to Satan’s lies and allurements.
"I think Peter forever after was conscious of just how easy it was to succumb, even as a believer, to succumb to his lies and his allurements and his temptations." – Dr. Thomas [04:55]

Notable Quotes and Memorable Moments

On spiritual inability and responsibility:
“Spiritual inability doesn’t rule out human responsibility. We are free agents... we still choose within the limits of our nature.” – Dr. Thomas [01:40]
On Satan’s deepening work:
"He deepens their blindness... in his utter hatred of God, his utter hatred of Christ and of the gospel and of that which is good, finds the company of other evildoers the source of his comfort and stability." – Dr. Thomas [03:45]
On the persistence of Satan:
"He still prowls about like a roaring lion seeking whom he may devour." – Dr. Thomas [04:12]

Timestamps for Important Segments

[00:29] – Dr. Thomas begins explanation of total depravity
[01:40] – Discussion of spiritual inability and human responsibility
[02:29] – How Satan blinds and reinforces unbelief
[03:42] – The "corpse desecration" analogy
[04:12] – Satan’s continued activity in the world and his motivation
[04:55] – Application: Peter’s example and temptation of believers

Summary

Dr. Derek Thomas addresses the complex theological issue of total depravity versus Satan’s blinding work. He explains that while all people are dead in sin (total depravity), Satan actively aggravates this condition, further blinding unbelievers through spiritual oppression. This reinforcement of darkness not only fulfills Satan’s opposition to God but also brings him comfort in shared blindness. Despite loss of spiritual free will, humans maintain agency and responsibility. The episode closes with a pastoral reminder: even believers, as seen in Peter’s life, must remain vigilant against the deceiver's schemes.

Transcript

A (0:04)

If man is totally depraved, why does Satan blind unbelievers? Joining us this week on the Ask Ligonier podcast is ligonier teaching fellow Dr. Derek Thomas. Dr. Thomas, since man is totally depraved, why do we read in the Bible that Satan blinds the minds of unbelievers?

B (0:29)

Yes, this is a good question. It assumes a number of things. First of all, that the natural man, the unconverted man by nature is totally depraved. Not that he's as sinful as he possibly can be, but that there is no aspect of his being that isn't in some way tainted and marred by sin, and some more than others. So there are degrees of that total depravity in its effect upon the natural man. Total depravity then implies spiritual inability that the natural man is unable to by nature and by his own volition and natural abilities, to choose all the good that there is, or to choose to be saved or to choose to believe on Christ. But spiritual inability doesn't rule out human responsibility. We are free agents. We've lost free will, but we are still free agents. So we still choose within the limits of our nature, and we choose the clothes we wear. We choose the food that we eat. We get a menu and we say, no, I don't want that. I don't want that. I want a burger. So natural man has that ability. But there is, I think in Scripture a sense in which Satan works on the hearts and minds and wills and desires of the natural man in a kind of spiritual oppression and blinds them by reinforcing their sinfulness, reinforcing their unbelief. He deepens their blindness. And it's really hard, and I don't really want to do it, to put yourself into the mindset of Satan. There's something about that. I just don't want to go there. That he himself never seeks the light, but he wants the comfort of companions and followers and servants who won't seek the light either, to confirm his blindness by the blindness of others. Now you're asking a question about causality. You know, how does that happen? If the natural man is totally depraved, how can Satan be further blind him? And the only illustration that I can come up with is that a corpse may be dead, but you can always desecrate that corpse. And this action of Satan, in his utter hatred of God, his utter hatred of Christ and of the gospel and of that which is good, finds the company of other evildoers the source of his comfort and stability. And it's utter darkness. But it's a question, of course, that reminds us that Satan is still alive. He hasn't yet been cast into outer darkness that John speaks of in Revelation 20, which is yet to come. He still prowls about like a roaring lion seeking whom he may be devour. And he tempts believers too, as we see in the narrative of Peter that Satan was there prowling about. Which is why Peter I'm quoting Peter's words. And I think Peter forever after was conscious of just how easy it was to succumb, even as a believer, to succumb to his lies and his allurements and his temptations.