I was listening to the idea yesterday: You Were Never Told to "Be Strong". The Hebrew Behind Joshua 1:9 Reveals the Real Command.
- According to the video, the Hebrew word amatz (אמץ) means to dig in or to be steadfastly determined.
- While the word chazaq (grip) refers to holding onto something external, amatz describes an internal posture—setting one's jaw and fixing one's direction. The narrator explains that chazaq and amatz are often paired together (as in Joshua 1) to form a complete picture of biblical strength: one is the act of holding on, and the other is the inward resolution to keep going,
Today in my normal reading I came to Eph 6:10-20, so I did a word study with biblehub.com to see how well these ideas match up.
"Be Strong and Courageous" — A Study in the Original Languages
The Core Command: Ephesians 6:10
The Greek is ἐνδυναμοῦσθε (endunamouste) — a present passive imperative. That grammatical form does most of the theological work. It's not "generate strength" but "be continuously empowered." The source is outside you; you are the recipient. The command is to keep receiving, keep positioning yourself under the supply.
Paul then piles up three distinct Greek power-words: κράτει τῆς ἰσχύος (kratei tēs ischyos) — "the dominion of his inherent strength." Kratos is ruling, governing power. Ischus is raw, inherent capacity. Neither belongs to you by nature.
This is the frame for every other verse.
The Hebrew Foundation: Joshua 1:9
"Be strong and courageous" = חֲזַק וֶאֱמָץ (chazaq we-'emats).
Chazaq (חָזַק) means to grip, to seize, to hold fast — the image is fingers tightening around something. In context it's closer to brace yourself or hold your position than a feeling of confidence. It's used of Elijah gripping the hand of Ahab, of hands being clasped. It's volitional and bodily.
'Emats (אָמַץ) carries mental resolve — obstinate determination, refusal to flinch. Isaiah 41:10 uses the same root when God says "I will strengthen you" (immatstiykha) — meaning God does to you what you are commanded to do yourself. The divine action and the human action use identical vocabulary. That's intentional.
Critically, the command precedes the reason: be strong… because the Lord your God is with you. Courage is not the precondition for God's presence; it's the appropriate response to it.
The Greek Power-Cluster: Ephesians 1:19-20
This is the densest power passage in the NT. Paul uses four Greek words in two verses:
- δύναμις (dunamis) — latent power, inherent ability
- ἐνέργεια (energeia) — active, working energy
- κράτος (kratos) — dominion, ruling might
- ἰσχύς (ischus) — strength as raw capacity
And he says: that same power — the resurrection power that lifted a dead man out of the grave and seated him over every cosmic authority — is the power toward (εἰς) those who believe. Not power for you as a distant resource, but power actively directed at you right now.
Key Themes Across the Passages
1. Weakness is the prerequisite, not the obstacle (2 Cor 12:9)
"My power is perfected in weakness" — τελεῖται (teleitai), "brought to its full expression, completed." God's dunamis reaches its telos in your acknowledged insufficiency. Strength in your own resources actually limits what he can do; weakness creates the opening.
2. Waiting as weaving (Isaiah 40:29-31)
"Wait upon the LORD" = קָוָה (qavah) — not passive sitting but a word that means to twist together, to braid, to bind into a cord. Waiting on God is an intimate intertwining, not idleness. Those who qavah don't just get rest — they get renewed strength, literally "they exchange strength" (יַחֲלִיפוּ כֹחַ, yachalifū koach).
3. Joy as structural strength (Nehemiah 8:10)
"The joy of the LORD is your strength" — Hebrew עֹז ('oz), often translated fortress or refuge. Joy isn't an emotional bonus; it's a load-bearing wall. The context is fascinating: the people are grieving over the law they'd forgotten, and they're told this is not the day for grief — there's a holy boldness to appropriating joy as a weapon against despair.
4. The Word as the source of the young man's strength (1 John 2:14)
"You are strong… the word of God abides in you." The strength of the young men isn't their youth or zeal — it's the residing, settled presence of the Word. Abides = μένει (menei), a favorite Johannine word for permanent, relational indwelling.
5. Patience and endurance as the fruit of power (Colossians 1:11)
This one surprises most readers. Being "strengthened with all power according to his glorious might" produces… ὑπομονή (hypomonē, steadfast endurance) and μακροθυμία (makrothumia, patient long-suffering). The proof of divine strength in a person isn't dramatic displays — it's the capacity to bear weight over time without breaking.
6. Grace as the medium (2 Timothy 2:1)
"Be strong in the grace" — same endunamou as Eph 6:10. Grace isn't just forgiveness; it's the operative field in which divine empowering takes place. You're not strong by discipline alone, but by inhabiting the grace-space.
The Synthesis
The phrase "be strong and courageous" is not a pep talk. In both Hebrew and Greek, it's a command to reorient your source. Chazaq/emats in Hebrew and endunamoō in Greek both assume you don't have what's needed in yourself and that there is somewhere to get it.
The theological logic runs like this:
- God's power raised Christ from the dead (Eph 1:19-20)
- That same power is actively directed toward believers
- The passive voice — "be empowered" — is the appropriate posture
- Weakness, not strength, opens the channel (2 Cor 12:9)
- Joy, the Word, waiting/intertwining, and grace are the means of access
- The outcome is not invincibility but endurance — the ability to keep walking without fainting (Isaiah 40:31)
The command to be strong is, at its root, a command to trust someone else's strength rather than your own.
