Ephesians 5:17 Commentary: Understanding the Will of the Lord

Ephesus was a major port city in Asia Minor, a crossroads of Roman, Greek, and Eastern cultures. It housed the great temple of Artemis, one of the seven wonders of the ancient world, and was famous for magic and occult practices (cf. Acts 19). Paul’s letter repeatedly contrasts light and darkness, wise and foolish, as believers are called out of that pagan environment. Adam Clarke, citing Livy, connects the command “do not be foolish” to the orgiastic rites of Bacchus, where worshippers acted like madmen, heads tossing, frenzied with wine. The immediate context of Ephesians 5:15, 17 highlights the urgency: “the days are evil,” so believers must “redeem the time” by walking circumspectly. Understanding the Lord’s will is presented as the antidote to senseless living. The word for “foolish” (ἄφρων) means literally “without reason”, not low IQ but moral and spiritual senselessness, the kind that ignores God’s revealed ways. Paul piles up imperatives: watch how you walk, don’t be foolish, understand what the Lord wants. In a culture full of competing voices, from Artemis worship to Roman emperor cults, discerning God’s will required constant attention. This historical pressure makes the verse intensely practical: it was never a theoretical puzzle, but a daily survival skill for holy living in a corrupt world.

The Alexandrian manuscript, Vulgate Latin, Syriac, and Ethiopic versions read “will of God” (θέλημα τοῦ θεοῦ) instead of “will of the Lord” (θέλημα τοῦ κυρίου). The difference is minor in meaning, since Paul often uses “Lord” for Christ and “God” for the Father interchangeably in ethical contexts. No other significant textual variants for this verse are noted in the consulted sources.

In the ancient church, Ephesians 5:17 was used in catechetical teaching to instruct new believers on moral discernment, especially in contrast to pagan revelry (cf. Chrysostom’s homilies on Ephesians). During the Reformation, Calvin and others seized on the verse to affirm sola Scriptura: the will of the Lord is known through the Word, not through extra-biblical revelations. In the Wesleyan tradition, the verse was linked to the doctrine of entire sanctification, understanding God’s will leads to a heart fully conformed to His commands. Across all eras, the verse has been sung in hymns of consecration (e.g., “Take My Life and Let It Be”) and quoted in decision-making guides. It remains a touchstone for believers seeking practical wisdom in a complex world.

Three-Point Outline

1. The Danger of Foolishness: The command “do not be foolish” uses a present imperative (μὴ γίνεσθε), don’t keep becoming senseless. Foolishness is not a fixed state but a drift that can happen gradually, especially when we stop redeeming the time.
2. The Call to Understand: “Understand what the will of the Lord is”, the verb συνίετε means to set together in the mind, to grasp with both intellect and intention. This understanding is never passive; it requires seeking God in Scripture, prayer, and the community of believers.
3. The Goal: Obedient Living: As Gill and others stress, true understanding of God’s will is proven by doing it. Paul will immediately contrast drunkenness (loss of control) with being filled with the Spirit (v.18), showing that understanding God’s will leads to Spirit-led worship.

Five-Point Outline

1. Why “Therefore”? Because the days are evil (v.16) and we need wisdom to seize every opportunity.
2. What Foolishness Looks Like: Living as if God hasn’t spoken, ignoring His commands, wasting time on empty pursuits.
3. How to Understand God’s Will: Through the Word (Calvin, referencing Ps. 119), through the renewing of the mind (Rom. 12:2), and through the Spirit’s illumination.
4. What the Will of the Lord Is: Not a hidden blueprint for every decision, but the revealed will of sanctification (1 Thess. 4:3), thanksgiving (1 Thess. 5:18), and love for others.
5. Where Understanding Leads: To a life filled with the Spirit, singing, giving thanks, and submitting to one another (vv. 18, 21).

Illustration Hooks

• Smartphone Distractions: Many of us spend hours scrolling through trivial content, then wonder why we lack clarity about God’s will. The “evil days” of constant digital noise make understanding God’s voice harder, not easier.
• Navigating a Crisis: When a family member is diagnosed with cancer, the world offers anxious busyness. Understanding the Lord’s will means trusting His character while making wise medical choices.
• Time Budgeting: Just as we budget money, we must budget time. “Redeeming the time” (v.16) means treating each hour as a gift to use for what matters to God.

Questions Your Congregation Is Asking

• “How do I know if I’m being foolish without realizing it?”
• “Does ‘the will of the Lord’ mean a specific plan for my career or marriage, or just general moral commands?”
• “If the days are evil, how do I stay hopeful while still being wise?”

Ephesians 5:17 is a direct call to replace empty living with active understanding of God’s will. As you discuss, keep in mind Paul’s urgent context: evil days demand wisdom. This isn’t about being perfect, but about being attentive.

Discussion Questions

1. Observation: What two commands does Paul give in verse 17? How are they connected to verses 15, 16?
2. Observation: Look at the word “foolish” (ἄφρων). In what ways might a Christian drift into foolishness without realizing it?
3. Interpretation: What does it mean to “understand” (συνίημι) the will of the Lord? Is this intellectual knowledge or something more?
4. Interpretation: Read Romans 12:2 and compare it to this verse. How does the renewal of the mind help us discern God’s will?
5. Application: Think of a time when you faced a confusing decision. What habits helped you understand God’s will? What habits got in the way?
6. Application: The verse follows “redeeming the time, because the days are evil.” How does our use of time reveal whether we are being foolish or wise?
7. Application: What is one step you can take this week to better understand the will of the Lord in a specific area of your life?