Ephesians 6:10-17

It was a perfect beach afternoon.

My four-year-old niece Harper and five-year-old nephew Asher were beside me, hands clasped in mine, staring down the incoming Atlantic. We’d been jumping waves together — laughing, shrieking with joy, as their little legs kicked up white foam as I lifted them above each wave.

Then I changed the game.

“Be a statue!” I called out. We dug our feet into the wet sand and braced ourselves. The waves crashed against us. We stood firm.

“Punch the wave!” They swung a fist as if in a fierce battle. More joy.

But then a bigger wave snuck up on us. We got distracted for one moment, and it knocked us flat. Saltwater in our eyes and mouths.

We learned something important that afternoon: If you’re not ready for the wave, the wave will knock you over.

The Apostle Paul would say the same thing about the spiritual life.

The Battle You Didn’t Know You Were In

In Ephesians 6:10–17, Paul begins to bring his great letter to a close by preparing the church for battle. He wants the church at Ephesus (and every church after them) to know something urgent: there is a very real enemy who wants to knock you over spiritually. He wants to pull you away from trusting and obeying God.

But before Paul describes the enemy or the armor, he starts with something more important: the strength.

“Finally, be strengthened by the Lord and by his vast strength.” — Ephesians 6:10

Notice what Paul didn’t say. He didn’t say, Be stronger. He didn’t say, Try harder. He didn’t say, Believe in yourself or dig deep. Our culture says, “You’ve got this.” Paul says something entirely different: God’s got you.

Harper and Asher couldn’t stand against those waves on their own. Their little legs had no chance. They needed someone stronger holding on to them. And that’s exactly the image Paul wants in our minds. God doesn’t just cheer us on from the shore. He is our strength. He lifts us above the waves, or he holds us steady as they crash around us.

And if we wonder whether that strength is adequate, Paul reminds us of God’s vast strength. God is so powerful that He counts every star in every galaxy and calls each one by name (Psalm 147:4). That’s the strength available to you.

The Enemy Is Real — and He Lies

So why do we need that strength?

“Put on the full armor of God so that you can stand against the schemes of the devil.” — Ephesians 6:11

The devil is God’s enemy, and he works strategically against God’s people. His primary weapon is lies. A twisted thought. A deceptive whisper. A half-truth planted in a moment of weakness.

You don’t have to obey.

Nobody will know.

God doesn’t really love you.

Look at your failures — are you sure you’re even saved?

These lies don’t stop when we grow up.

I remember a season in my own life when I faced this battle. “Are you sure God loves you? Look at all your sins. Are you really His?” I let those thoughts loop in my mind, and anxiety and discouragement followed. Then I realized something: those thoughts weren’t from God. They were lies. And I needed to fight them with the truth.

I began sleeping with Romans 8:1 open beside my bed: “There is therefore now no condemnation for those who are in Christ Jesus.” Every time the accusation came, I answered it with the Word. And slowly, the lies lost their grip.

That’s exactly Paul’s point. In verse 12, he names the real enemy:

“For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the cosmic powers of this darkness, against evil, spiritual forces in the heavens.”

The person who hurt you is not the enemy. The coworker, the ex, the critic, the bully — none of them are your real opponent. There are unseen spiritual forces at work behind the brokenness of this world, and they are at war with your soul. The sooner we understand that, the sooner we’ll stop fighting the wrong battles.

Getting Dressed for the Day

Because the battle is real, Paul urges us to get dressed for it.

“For this reason, take up the full armor of God so that you may be able to stand your ground on the evil day.” — Ephesians 6:13

Before a firefighter runs into a burning building, they put on their gear. Before a soldier enters combat, they strap on their armor. Paul says the Christian does the same.

Here’s the armor:

The Belt of Truth. A soldier’s belt held everything together. The devil’s primary weapon is deception, so God’s first piece of protection is truth. When lies come, we don’t respond with feelings or opinions. We respond with what God has said. Truth is the framework that holds everything else in place.

The Breastplate of Righteousness. Jesus makes us righteous. We are clothed in His righteousness — not ours. This isn’t about moral performance to earn God’s approval. It’s about living out of who we already are in Christ. We walk in obedience because we’ve been loved, not in order to be loved.

The Shoes of the Gospel of Peace. Good shoes keep you moving. Paul says we should always be ready to share the Good News — that through Jesus Christ, we can have peace with God. Anyone who trusts Him can be saved. We carry that message everywhere we go.

The Shield of Faith. The Roman shield Paul had in mind was large — designed to protect the whole body. Faith is trusting God’s promises when everything else feels uncertain. The enemy fires arrows of fear, doubt, and discouragement. Faith extinguishes them.

The Helmet of Salvation. The enemy loves to attack our minds. You’re not enough. You’ve gone too far. God is done with you. The helmet of salvation protects our thought life by anchoring us to who we are in Christ: saved by grace, belonging to Jesus, our future secure. When those thoughts come, we don’t debate them. We remember whose we are.

The Sword of the Spirit. This is the only offensive weapon in the list — and it is the Word of God. When Jesus was tempted in the wilderness, Satan came at Him with lies. Jesus didn’t respond with feelings or arguments. Three times, He answered: “It is written.” Not “I feel.” Not “I think.” Not “My opinion is.” It is written.

The Bible cuts through deception. That’s why we read it, memorize it, and return to it again and again. When you are scared, tempted, or discouraged, the first question to ask is: What has God said? Then open the Word. And stand firm on His truth.

The Battle Was Already Won

This battle didn’t start with us.

In the beginning, in a garden, the enemy lied. Adam and Eve listened — and humanity fell. But God made a promise: a Savior would come who would crush the serpent’s head. That Savior is Jesus.

Where Adam fell, Jesus stood firm. Where Adam surrendered to the lie, Jesus answered every temptation with truth. And on the cross, He bore the full weight of our sin and failure — paying the price we couldn’t pay. Then He rose from the grave in victory, and now reigns over every ruler, authority, power, and dominion.

Because Jesus stood firm for us, we can now stand firm in Him.

We don’t fight for victory. We fight from it. The armor we wear belongs to the One who has already won.

How to Actually Live This Out

So what does this look like in real time?

Be alert. Expect lies. Expect temptation. Not every thought that enters your mind is true, and not every thought that feels true is from God. Test what you’re thinking against what Scripture says.

Get dressed every day. Ask yourself each morning: Am I filling my mind with God’s truth? Am I trusting His promises? Do I remember who I am in Christ? Am I picking up the Word? We put on God’s armor deliberately.

Stand firm in Christ. Pray. Stay connected to God’s people. Return to God’s Word. The strength was never supposed to come from us. Stand firm in His strength.

The waves at the beach didn’t stop coming. They never do. One after another, they keep coming.

Temptations come. Trials come. The lies of the enemy come.

But God has not left us defenseless. He has given us His strength, His armor, His Word — and most importantly, His Son. The battle is fierce, but the victory is already settled.

So when the waves come — stand firm in Christ.

When fear comes — stand firm in Christ.

When the lies come — stand firm in Christ.

Because the Lord is your strength, and Jesus Christ has already won.