The Vulnerable Soldier, 07: The Sword of the Spirit (Eph. 6:17)

Posted on 2025-11-17 by thelittleman

When I began this study about the vulnerable soldier, my focus was to turn our familiarity with “the spiritual armor” on its head. Rather than studying what it looks like to wear the armor, I’ve been challenging us to consider what it looks to drop the armor.

So far, we’ve studied what it looks like when a soldier wears every piece of armor except:

In this lesson, we investigate the final piece of armor—itself a weapon—which Paul references in Ephesians 6:17:

…and [take] the sword of the Spirit, which is the word of God

Gladius, The Roman Sword

A Roman soldier's short sword called the gladius (AI generated)

I haven’t owned a gun since I moved away from the States, though I think that if I still owned a concealed-carry weapon, I’d name it “Gladius.” What a cool name!

Although Paul used the Greek word machaira (μαχαίρα, a word that means “short sword” or “dagger”) in this passage instead of gladius, his reference in this context certainly points to the short sword that the Roman soldiers used, the gladius. This short, double-edged weapon was designed for thrusting into enemy ranks and for chopping at enemy limbs in close combat.

What it definitely wasn’t was the rhomphaia (ῥομφαία), a longer broadsword that we sometimes see in Sunday School illustrations—which also often show Medieval knights for some reason! This illustrative distinction matters, because our spiritual battles are generally close-quarter fights against temptation and deceit, where precision (not wild swinging) is most needed.

Roman soldiers carried this weapon everywhere, practiced it daily, and wielded it with precision and power. It’s no wonder Paul chose this as his illustration for the Word of God!

The Sword of the Spirit

With this legit illustration in mind, Paul encourages the Christian soldier to:

  • Keep the Word of God always sharpened and at the ready—accomplished through memorization
  • Practice it daily—accomplished through regular study and meditation
  • Use it for both offense and defense in spiritual battles—accomplished as the Holy Spirit Himself gives it power

We ought not forget either that this Sword of the Spirit is to be used offensively as well as defensively. While Paul’s language throughout this passage is mostly defensive (put on, take up, stand, withstand, etc.), there are logically times when the Word must also be wielded in offense to battle the darkness around us—and the darkness within us. Consider, for example, the personal impact of God’s Word in Hebrews 4:12:

For the word of God is living and active, sharper than any two-edged sword, piercing to the division of soul and of spirit, of joints and of marrow, and discerning the thoughts and intentions of the heart.

The Vulnerable Soldier without the Sword of the Spirit

So what happens when a soldier enters battle fully equipped with all the protective armor of Ephesians 6:10-17 yet fails to grab his sword? How vulnerable is the believer really without the Word of God?

Truth

  • The soldier that holds to doctrine but lacks the Word of God is the person who holds to tradition above all else. It’s the pastor or teacher or scholar who quotes John Calvin, Martin Luther, or the Puritans to the exclusion of God Himself, as if these flawed humans hold the monopoly on truth. It’s the person whose “Bible study” dives into the Apostle’s Creed or takes the Westminster Catechism line-by-line, all the while forgetting the Word that’s founded it all. This soldier believes he has the mind of Christ (1Corinthians 2:16), but has instead a saccharine substitute manufactured from the teachings of men.
  • The soldier who upholds integrity but has dropped the Sword of the Spirit is the one who will be easily swayed by every wind of doctrine (Ephesians 4:11-16). “Let go and let God” might be stitched into a pillow on her couch as she tries to “live her best life now.” She’s more interested in Jesus Calling than in Jesus Himself.

Goodness

  • The soldier who wears the breastplate of righteousness but can’t find the Sword of the Spirit knows all about the church’s list of Dos and Don’ts and prides himself in keeping every one. He’s beholden to the letter of the Law, unaware perhaps that he’s no longer under the law but under grace (see Romans 6). In fact, grace is greatly lacking in this person’s life, not to mention the love and patience that go with it. Legalism and bitterness have likely taken their place, and this person is well on his way to becoming an unhappy, belligerent old Scrooge.

Evangelism

  • The soldier who’s ready to share the Gospel but doesn’t carry the Word likely tends toward what some call “easy-believism.” While the Gospel is simple, it surely isn’t easy! Often people without a biblical understanding of the Gospel forget to discuss the essentials like Hell, sin, and repentance. Instead they tell people to “give your life to Jesus” or “ask Jesus into your heart” without mentioning the very real, very difficult discussions about confession, repentance, and submission.

Faith

  • The soldier who confesses a reliance on God but lacks the Word of God is relying on a god of his own making. How can he trust a God who’s so distant and who never communicates? How can he rely on Him, when he can’t even get up the gumption to read God’s dusty old book? This person masks his faith in God with faith in self, and the pose is best exposed when hard times come.
  • The soldier who claims resilience due to his faith but doesn’t trust the Word is one whose faith is mere words. This person’s “faith” will crumble when the battles rage, because it’s a fake faith based on the air of ideas about God, not on the Word of God itself.

Hope

  • The soldier who depends upon the hope of salvation but doesn’t trust the Word of God might be “so heavenly minded, she’s no earthly good.” Normally, one’s focus on Heaven is a spiritual boon, but not when that “heaven” is imaginary—a heaven where Jesus rides a rainbow unicorn, for example, or a heaven described following some fool’s 90-minute dream. Without an honest understanding of the biblical Heaven, this person is stuck in the clouds even before she gets there,

Conclusion

Oh how we all need the Word of God! How can it be that we soldiers of Christ sometimes lay the sword down in the grass while we nap? The blade gets blunted and rusty, and we think “Oh, I’ll fix that later”?

I challenge you pick up God’s Word again. Sharpen it, practice it, wield it. The enemy is on the prowl, and we ought never be caught empty-handed!

Put on the whole armor of God, that you may be able to stand against the schemes of the Devil……and [take] the sword of the Spirit, which is the word of God. (Eph 6:10,17)

©2025 E.T.

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