Be Strong in the Lord: What Ephesians Teaches Us About Faith, Identity, and Spiritual Warfare

The book of Ephesians is packed with some of the most powerful truths in all of Scripture. From who we are in Christ to how we are called to live and stand firm, Paul's letter to the Ephesian church is just as relevant today as it was when it was written. Here is a walk through some of its key themes and what they mean for your life right now.

What Does It Mean to Be Redeemed?

In Ephesians chapter one, Paul introduces a word that shapes everything else he teaches: redemption.

"In Him we have redemption through His blood, the forgiveness of sins, according to the riches of His grace." - Ephesians 1:7 New King James Version (NKJV)

Think of redemption like cashing in a coupon. You bring it in and receive what it promises. Before coming to Christ, every person was like a slave, sold under the power of sin. But the blood of Jesus shed on the cross purchased us out of that slavery. We are no longer bound. We are free.

Only Jesus could do this. He was the perfect sacrifice, and His blood was the only price that could buy us back.

Can You Earn Your Salvation?

Moving into Ephesians chapter two, Paul makes something very clear: this redemption cannot be earned.

"For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, lest anyone should boast." - Ephesians 2:8-9 New King James Version (NKJV)

This can feel strange to us. We are wired to think that hard work leads to reward. But salvation does not work that way. Praying more, reading more, giving more, none of it makes us more deserving of what God has done.

The word that helps make sense of this is inheritance. Children do not earn an inheritance. They receive it because of who their parents are and what their parents worked for. In the same way, we inherit what Jesus earned because we are children of God.

"But as many as received Him, to them He gave the right to become children of God, to those who believe in His name." - John 1:12 New King James Version (NKJV)

Your standing before God is not based on your performance. It is based on your position as His child. That truth alone should bring deep confidence and security.

What Does It Mean to Be Reconciled to God?

Paul also uses the word reconciled in Ephesians chapter two. To reconcile means to bring two opposing sides together onto the same team.

Before Christ, we were on the opposite side from God. The prophet Isaiah described it this way:

"All we like sheep have gone astray; we have turned, every one, to his own way." - Isaiah 53:6 New King James Version (NKJV)

Humanity chose its own path rather than God's, and that is what put us on the wrong side. But through the cross, everything changed. We are now redeemed, free, part of His household, and on the same side as God. That is what reconciliation means.

Why Is Jesus Called the Cornerstone?

Paul describes all of this, redemption, grace, reconciliation, as a foundation, not a finish line.

"Having been built on the foundation of the apostles and prophets, Jesus Christ Himself being the chief cornerstone." - Ephesians 2:20 New King James Version (NKJV)

A cornerstone is the very first stone placed in a building. Everything else is aligned to it. Get that one right, and the whole structure follows. Jesus is that cornerstone. These truths about who we are in Him are not the goal we are working toward. They are the starting point from which we build our lives.

How Should Christians Build Their Lives?

Once Paul establishes the foundation, he urges believers to build wisely on it.

"I, therefore, the prisoner of the Lord, beseech you to walk worthy of the calling with which you were called." - Ephesians 4:1 New King James Version (NKJV)

In 1 Corinthians, Paul uses the image of building with either precious stones, silver, and gold, or with wood, hay, and straw. It is the same idea as the story of the three little pigs. One pig built with straw, one with sticks, and one with bricks. When the wolf came and huffed and puffed, only the house of bricks stood firm.

Peter echoes this warning:

"Be sober, be vigilant; because your adversary the devil walks about like a roaring lion, seeking whom he may devour." - 1 Peter 5:8 New King James Version (NKJV)

The question is not whether the enemy will come. The question is what your house is built from when he does.

Building well is not only about church ministry. It includes how you raise your children, how you treat your employer, how you pursue unity in your relationships. These everyday things matter deeply to God.

What Is Spiritual Warfare and How Does It Actually Work?

After laying all of this out, Paul lands on a crucial encouragement in Ephesians 6:10:

"Finally, my brethren, be strong in the Lord and in the power of His might." - Ephesians 6:10 New King James Version (NKJV)

Why does he say this? Because there is a real enemy who wants to tear down what God is building.

"For we do not wrestle against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this age, against spiritual hosts of wickedness in the heavenly places." - Ephesians 6:12 New King James Version (NKJV)

Spiritual warfare does not look like what we might imagine. When Satan confronted Jesus in the wilderness, there were no swords or physical weapons. The entire battle was fought with words. Satan tempted Jesus through what He said, and every single time, Jesus responded with the Word of God.

"It is written, 'Man shall not live by bread alone, but by every word that proceeds from the mouth of God.'" - Matthew 4:4 New King James Version (NKJV)

This is the model for us. Know what the Word says. Speak it boldly. Respond to every lie with what God has declared to be true.

How Does the Enemy Try to Weaken Believers?

Jesus said in Mark 3:27 that no one can plunder a strong man's house unless they first remove the strong man. When Jesus is at the center of your life and your church, the enemy cannot plunder it. He is not strong enough to remove Jesus. But he can whisper in your ear until you move Jesus out yourself.

Here are some of the ways those whispers sound:

• "You've had a busy week. Skip church this Sunday."
• "That person doesn't like you. You'd be better off somewhere else."
• "It won't matter if you watch that, go there, or get involved in that."
• "You're sick. You better get used to it."
• "That kind of thing only happens for other people, not you."
• "People will laugh at you if you pray out loud or share your faith."

Every one of these is designed to push Jesus out of the center so the enemy can come in and take what He wants. Recognizing the strategy is the first step to resisting it.

Pride is another subtle tool. When we do something well and begin to take the credit, we are in dangerous territory. God resists the proud. King Nebuchadnezzar is a sobering example of what happens when we accept glory that belongs to God alone.

How Do We Resist the Enemy?

The answer is the same one Jesus modeled. Respond in faith with the Word of God.

"For the weapons of our warfare are not carnal but mighty in God for pulling down strongholds, casting down arguments and every high thing that exalts itself against the knowledge of God, bringing every thought into captivity to the obedience of Christ." - 2 Corinthians 10:3-5 New King James Version (NKJV)

The enemy is already disarmed. Colossians 2 tells us that Jesus triumphed over principalities and powers at the cross, making a public spectacle of them. And 1 John 4:4 reminds us:

"He who is in you is greater than he who is in the world." - 1 John 4:4 New King James Version (NKJV)

You do not have to be afraid. You do not have to be silent. Open your mouth boldly. Speak what the Word says. Resist the enemy steadfastly in faith, and he cannot prevail.

Life Application

This week, pay attention to the whispers. When a thought comes that discourages you, isolates you, tempts you to compromise, or makes you want to stay quiet, stop and ask: is this what God's Word says, or is this the enemy trying to move Jesus out of the center?

Find one area of your life where you have been listening to a lie and look up what the Bible actually says about it. Write it down. Speak it out loud. Practice responding the way Jesus did, with "it is written."

Ask yourself these questions this week:

• Am I building my life on the foundation of who I am in Christ, or am I still trying to earn what has already been freely given to me?
• What whispers have I been believing that are slowly moving Jesus out of the center of my life?
• What does the Word of God actually say about the thing I am struggling with right now?
• Am I building with gold and precious stones, or with hay and straw? What does my daily life reflect?

Be strong in the Lord and in the power of His might. Not your strength. His. That is more than enough.