Walking in the Light (Ephesians 5: 8-14)

This Podcast is part of a 10-year project to complete an in-depth, daily study of the entire Bible, chapter by chapter, verse by verse. 

Episode Notes: Walking in the Light (Ephesians 5: 8-14)

Welcome back, friends.

 It’s a joy to have you with me again as we continue our time together working through Paul’s magnificent letter to the Ephesians. A letter that has been guiding us step by step through what it means to live out our calling in Christ.  

We’ve already explored what it means to: 

Walk in unity,

Walk in truth,

Walk in honesty,

Walk in kindness,

Walk in forgiveness,

And walk in love.

 And now, Paul takes us into one of the most beautiful and profound metaphors in the entire New Testament — the call to walk in the light.

 Light and darkness are among the Bible’s most powerful images.

 From the opening words of Genesis, “Let there be light,” to the final chapters of Revelation where “the Lamb is its lamp”, Scripture uses light to describe God’s presence, God’s purity, God’s truth, and God’s transforming power.

 So today, we’re going to explore what it means to be “light in the Lord.”

How the light of Christ changes us, how we live as children of light, 

and how the light exposes, heals, and transforms everything it touches….

Transcript

Transcript: Walking in the Light (Eph 5: 8-14)

WELCOME & INTRODUCTION

Welcome back, friends.

It’s a joy to have you with me again as we continue our time together working through Paul’s magnificent letter to the Ephesians. A letter that has been guiding us step by step through what it means to live out our calling in Christ.

We’ve already explored what it means to:

Walk in unity,

Walk in truth,

Walk in honesty,

Walk in kindness,

Walk in forgiveness,

And walk in love.

And now, Paul takes us into one of the most beautiful and profound metaphors in the entire New Testament — the call to walk in the light.

Light and darkness are among the Bible’s most powerful images.

From the opening words of Genesis, “Let there be light,” to the final chapters of Revelation where “the Lamb is its lamp”, Scripture uses light to describe God’s presence, God’s purity, God’s truth, and God’s transforming power.

And Paul now says something astonishing:

“You were once darkness, but now you are light in the Lord. Walk as children of light.”

(Ephesians 5:8)

Not in the darkness, not surrounded by darkness, not struggling with darkness.

You were darkness.

Now you are light.

This is one of the clearest “before and after” statements in the entire Bible. A spiritual transformation so dramatic that only the language of light and darkness can capture it.

So today, we’re going to explore what it means to be “light in the Lord,”

How the light of Christ changes us, how we live as children of light, 

and how the light exposes, heals, and transforms everything it touches….

 Let’s begin by reading the passage together.

8 For you were once darkness, but now you are light in the Lord. Live as children of light 9 (for the fruit of the light consists in all goodness, righteousness and truth) 10 and find out what pleases the Lord. 11 Have nothing to do with the fruitless deeds of darkness but rather expose them. 12 It is shameful even to mention what the disobedient do in secret. 13 But everything exposed by the light becomes visible – and everything that is illuminated becomes a light. 14 This is why it is said:

‘Wake up, sleeper, rise from the dead, and Christ will shine on you.’

(Eph 5: 8-14)

OPENING SEGMENT — “Before and After: From Darkness to Light”

Have you ever seen those dramatic weight‑loss adverts, the ones with the “before” and “after” photos?

On the left, the person stands in their old oversized trousers, holding out the waistband to show how much has changed. On the right, the “after” picture shows a transformed life.

It’s a powerful visual. And it made me wonder: What would a “before and after” picture look likefor someone who has become a follower of Jesus Christ? What image could capture the transformation from life without Christto life in Christ?

It’s difficult, isn’t it? People come from such different backgrounds,

with different stories, different struggles, different journeys.

But the New Testament gives us a picture, not in photographs, but in metaphors. It describes our “before and after” in spiritual terms:

Death → Life  

Before Christ, we were spiritually dead.

In Christ, we are born again.

Slavery → Freedom  

Before Christ, we were slaves to sin. In Christ, we are redeemed and set free.

Enemies → Friends  

Before Christ, we were enemies of God. In Christ, we are reconciled.

Far Off → Brought Near  

Before Christ, we were distant. In Christ, we are brought close.

And now, in Ephesians 5, Paul introduces another before‑and‑after image, one of the most vivid of all:

Darkness → Light

“For you were once darkness, but now you are light in the Lord.”   (Eph 5:8)

Notice Paul doesn’t say:

“You were in darkness.” “You walked through darkness.” “You struggled with darkness.”

He says:

“You were darkness.” Darkness wasn’t just around us, it was in us.

It defined us.It shaped our thinking, our desires, our choices and our identity.

But now — because of Christ, something miraculous has happened.

“You are light in the Lord.”

Not “you have some light. Not “you’re learning about the light.Not “you’re trying to be light.”

You are light.

This is your new identity.

This is your new nature.

And this is your new calling and because of that, Paul says: “Live as children of light.”

In other words: Be who you already are. Live out what God has made you. Let the light of Christ shine through you.

Why Light? Why This Metaphor?

Light is one of the Bible’s favourite ways to describe the presence and character of God.

“God is light; in Him there is no darkness at all.” (1 John 1:5)

“The Lord is my light and my salvation.” (Psalm 27:1)

“The people walking in darkness have seen a great light.” (Isaiah 9:2)

“I am the light of the world.” (John 8:12)

What does light do? Light reveals. Light guides. Light purifies. Light exposes. Light heals and light gives life.

And Paul says:

This is what God has made you, this is who you are now.

You are not defined by your past.

You are not defined by your failures.

You are not defined by your old life.

You are defined by the light of Christ that now lives within you.

The Before and After of Every Christian.

If we were to create a spiritual “before and after” picture for every believer, it would look like this:

Before: Darkness

After: Light

Before Christ, we were stumbling, searching, lost, blind,confused, and spiritually dead.

After Christ,

We are illuminated, guided, awakened, transformed, and spiritually alive.

This is the miracle of salvation. This is the power of the gospel, and this is the identity of every believer. And now Paul says: “Walk in the light. Live out what God has made you and let the light shine.”

So that is why Paul begins with a breathtaking statement: “You were once darkness, but now you are light in the Lord. Live as children of light.”

This is not a suggestion, it is a statement of identity, it is a calling and it is a description of what God has already made us. And the very first instruction that flows from this new identity is simple: “Live as children of light.”

Before Paul talks about exposing darkness, before he warns about the deeds of darkness, before he calls us to wake up, he begins with the positive:

Walk in the light. Live out the light and let the light of Christ shine through you.

What Does It Mean to Be “Light in the Lord”?

To understand this, we need to look at how the Bible uses the imagery of light. The clearest explanation comes from the apostle John. In 1 John he writes: “God is light, and in Him is no darkness at all.”

In his Gospel, John tells us: “Jesus is the Light of the World, The light shines in the darkness, and the darkness cannot overcome it”.

And in the Sermon on the Mount, Jesus turns to His disciples and says: 

“You are the light of the world.”

John says it.

Jesus says it.

And now Paul says it.

The message is consistent:

If God is light, and Christ is light, and Christ lives in you, then you are light.

Not because of your personality. Not because of your achievements. Not because of your moral performance. You are light in the Lord because it is His light shining through you.

What Does It Look Like to Walk in the Light?

Paul doesn’t leave us guessing. He immediately defines it. “For the fruit of the light consists in all goodness, righteousness, and truth.”  

(Eph 5:9) 

Verse 9 explains verse 8.

It tells us what “walking in the light” actually means.

1. Goodness

2. Righteousness

3. Truth

Let’s take them one at a time.

1. Goodness — Doing What Benefits Others

The Greek word translated goodness  is rich and practical. It means: benevolence, generosity doing what is beneficial, acting in a way that helps others and being serviceable.

It is not merely “being good” in a moral sense. It is doing good in a practical sense.

It is kindness in action. It is love with sleeves rolled up and it is the willingness to be inconvenienced for the sake of someone else.

Goodness is also a fruit of the Spirit. (Galatians 5:22). It grows in us

as we walk with God and desire to please Him.

2. Righteousness — Doing What Is Right Before God

Righteousness means living in a way that aligns with God’s character

and God’s standards. It is not self‑righteousness. It is not moral superiority. It is not legalism. It is simply living in a way that reflects the holiness of God and the heart of Christ.

Righteousness is the outward expression of an inward transformation.

3. Truth — Seeking What Is Real and Pleasing to God

Truth has become a rare commodity today. We live in a culture that says: “What’s true for you is true for you.” “Follow your truth.” “Live your own story.” But Scripture says: Truth is not personal preference.

Truth is what God says.

Paul says in verse 10: “Find out what pleases the Lord.” The Greek word means: to test, to examine, to prove and to discern what you believe.

Walking in the light meanswe are constantly asking:

What is true?

What is right?

What pleases the Lord?

And what aligns with His Word?

Some people defend their opinions more fiercely than they seek God’s truth. But walking in the light means we are truth‑seekers, not opinion‑defenders.

Walking in the Light Means Living for the Benefit of Others

When you put all this together, Paul is saying that walking in the light

means living in such a way that your life becomes a blessing to everyone around you.

Goodness — helping others.

Righteousness — honouring God.

Truth — seeking what pleases Him.

This is what it means to be a child of light.

This is what it means to let your light shine. This is what it means to walk in the Spirit.

Exposing Darkness by Simply Being Light

Paul now moves from the positive command. “Live as children of light”, to the negative command: “Have nothing to do with the unfruitful works of darkness, but rather expose them.” (Eph 5:11)

This is a strong statement. But notice carefully what Paul does not say.

He does not say, go hunting for darkness or go around go condemning the world. Instead, he says:

“Do not participate, and let your light expose.”

Light exposes darkness simply by being light. It doesn’t need to shout, it doesn’t need to argue and it doesn’t need to condemn. It just needs to shine.

How Light Exposes Darkness

The word Paul uses for “expose” has the idea of convincing, persuading, or revealing.

Not humiliating or attacking or shaming but revealing truth by contrast.

Let me illustrate.

Imagine a room full of men wearing filthy shirts. If one man walks in

wearing a spotless white shirt, he doesn’t need to say a word. His very presence highlights the dirt on everyone else. That is what happens when a Christian walks in the light.

Your life — your integrity, your kindness, your purity, your honesty, your gentleness — stands in contrast to the darkness around you…. And people feel it.

Sometimes they feel drawn to it. Sometimes they feel convicted by it.  Sometimes they feel uncomfortable, but the light shines whether they welcome it or not.

A Story: Billy Graham and the Golfer.

There’s a famous story about Billy Graham playing in a celebrity golf tournament with President Gerald Ford and a well‑known professional golfer.

After the round, another golfer asked the pro: “How was it playing with the President and Billy Graham?” The man snapped: “I didn’t need Billy Graham shoving religion down my throat today!” He stormed off to the practice tee and angrily pounded balls for several minutes.

When he finally calmed down, someone asked Jack Nicklaus what Billy Graham had said. Nicklaus replied: “Billy didn’t say a word about God or religion.” Not one word.

Yet the man felt exposed. Why?

Because Billy Graham’s life reflected Christ. His presence alone

brought light into the darkness. That is what Paul is talking about.

The Holy Spirit’s Work of Conviction

The same Greek word for “expose” is used in John 16 when Jesus says: “When the Holy Spirit comes, He will convict the world of sin, righteousness, and judgment.”

Conviction is Spirit’s work, not ours.

Our job is to shine. His job is to convict.

We don’t expose darkness by attacking people. We expose darkness by walking in the light.

Why Darkness Must Be Exposed

Paul continues: “It is shameful even to mention what the disobedient do in secret.” (Eph 5:12)

Darkness thrives in secrecy. Sin grows in the shadows. Hidden things multiply in the dark. But Paul says: “Everything exposed by the light becomes visible.” (Eph 5:13)

Light reveals, light uncovers, light transforms and then Paul adds something remarkable “…and everything that is illuminated becomes a light.”

In other words: When the light of Christ shines on someone,

they themselves can become a light”.

This is the miracle of grace. This is the power of the gospel. This is how God transforms lives.

Wake Up, Sleeper!” — A Call to Believers

Paul ends this section with a quotation: “Wake up, sleeper, rise from the dead, and Christ will shine on you.”   (Eph 5:14)

Who is he talking to? Not unbelievers. Not the world. Not the spiritually dead…. He is talking to Christians.

Believers who have fallen asleep spiritually. Believers who have become desensitised to sin. Believers who are living among the spiritually dead and beginning to imitate them.

Paul says:

Wake up.

Rise up.

Stop sleepwalking through your Christian life. Stop blending in with the darkness. Stop living like those who do not know Christ.

Let the light of Christ shine on you, and through you.

You cannot always choose your family. You cannot always choose your colleagues, but you can choose your friends.

You can choose who influences you. You can choose who shapes your thinking and you can choose who you walk with.

So, Paul says:

Wake up.

Rise up.

And shine.

Be who you area child of light.

Wake Up, Shine, and Punch Holes in the Darkness.

Before we close, let me give you a few real‑world pictures that help us feel the weight of Paul’s warning — and the beauty of his invitation.

1. The Sleeping Sickness — A Picture of Spiritual Lethargy

In parts of Central Africa, there was once a devastating disease known as sleeping sickness. Between 1901 and 1904, one province alone lost 100,000 people. 

The disease was caused by a parasite carried by a tiny mosquito. The bite was painless. The symptoms took years to appear and by the time drowsiness set in, it was almost always too late. People simply drifted into sleep… and then into death.

Before the cause was discovered, the natives saw no connection between the bite of the insect and the fatal lethargy that followed years later. They didn’t even bother to brush the insects away. But once the truth was known, they did everything they could to eradicate the mosquito:

Cutting back the jungle, clearing the brush, hanging nets changing their environment…. Why?

Because they finally understood the danger.

Friends, that is a picture of what Paul is talking about.

Some people have been “bitten” by the world, and they are spiritually drowsy without realising the danger they are in.

They are drifting. Numbing. Sleeping among the dead.

And Paul cries out: “Wake up, sleeper! Rise from the dead, and Christ will shine on you.”

If you truly want to know the Lord…

if you truly want to walk in the truth…

if you truly want to live in the light…

Wake up.

Shake off the lethargy.

Step out of the shadows.

Walk in the light.

Don’t fall asleep among the spiritually dead. Don’t drift into darkness and don’t let the world’s influence lull you into compromise.

Wake up, and walk in the light.

Robert Louis Stevenson — “Punching Holes in the Darkness”

As a young boy in Edinburgh, Robert Louis Stevenson was fascinated

by the old lamplighters. Every evening, he would watch them climb their ladders and light the gas lamps along the street. One night, as he stood at the window in childlike wonder, he said to his parents: 

“Look! There’s a man out there punching holes in the darkness.”

What a picture of the Christian life. That is what you are called to do. We punch holes in the darkness.

Not by shouting, not by condemning, not by arguing, but by shining.

By living a life of goodness, righteousness, and truth. By letting the light of Christ break through the darkness around you.

Your Influence Matters — Don’t Hide the Light.

We live in a culture that says: “Live and let live.” “Believe whatever you want.” “As long as it’s meaningful to you, that’s enough.”

But Jesus never said that. He said: “Let your light shine before others, so they may see your good works and glorify your Father in heaven.”

Your role as a Christian is not to blend in but to shine. Not to hide your faith but to live it openly. 

Not to keep silent, but to speak of Christ  with humility and grace.

Let your light shine and when people notice it, tell them why.

Tell them about the Lord. Tell them what He has done for you.

Tell them how He brought you out of darkness and into His marvellous light.

Because people in darkness need the light. They need Him and God has placed you in their world to shine.

Outro

Thank you for joining me today. Ephesians 5 has shown us that walking in the light is not about perfection, it is about direction. It is about living in such a way that the light of Christ shines through your life and exposes darkness simply by contrast.

And in our next episode, Paul takes this theme even further.

He moves from walking in the light   to walking in wisdom and learning how to live carefully, purposefully, and spiritually awake in a world that is spiritually asleep.

EPISODE 24 — “Walking in the Light” (Part 2): Living Awake in a Sleeping World. (Ephesians 5:15–21)

We’ll explore what it means to make the most of every opportunity, to understand the Lord’s will, and to be filled with the Spirit.

I hope you’ll join me for that.

Until then, may Christ shine on you, may His light guide your steps,

and may your life reflect the radiance of the One who called you out of darkness into His marvellous light.