From Genesis to Jesus: Be Strong and Courageous, Do Not Fear

“Be strong,” “fear not,” and “do not be afraid”—are among the most repeated commands in the whole of Scripture. They serve as a steady reminder of God’s presence, covenant faithfulness, and empowerment in times of trial, war, or mission. Who says them, and to whom?

I. 1. "Fear not / Do not be afraid"

• Frequency: This is the most common of the three. Scholars often point out that some form of “do not be afraid” (אַל־תִּירָא al-tiraʾ in Hebrew; μὴ φοβεῖσθε mē phobeisthe in Greek) appears over 100 times in the Bible, sometimes claimed as 365 times (one for every day of the year), though that number includes variations and paraphrases. A more text-critical count is usually around 70–100 instances, depending on translation.
• Contexts:
  • Covenant assurances: God to Abraham (Gen. 15:1), Isaac (Gen. 26:24), Jacob (Gen. 46:3).
  • National encouragement: Moses to Israel at the Red Sea (Exod. 14:13), Joshua to Israel entering the land (Josh. 10:25).
  • Prophets: God reassuring His people in exile (Isa. 41:10; 43:1; 44:2).
  • Angelic visitations: To Zechariah (Luke 1:13), Mary (Luke 1:30), shepherds (Luke 2:10).
  • Jesus to disciples: In storms (Matt. 14:27), after the resurrection (Matt. 28:10), regarding persecution (Luke 12:32).
• Theological thrust: Fear is natural, but God’s presence is greater.

The command often comes with the promise of “for I am with you.”

2. "Be strong"

• Frequency: Hebrew uses חֲזַק (ḥazaq, "be strong") frequently, often paired with “and courageous.” Appearances cluster around transition moments (Moses → Joshua, Israel → conquest).
  • The exact phrase “be strong and courageous” occurs at least 10 times (Deut. 31:6–7, 23; Josh. 1:6–7, 9, 18; 1 Chr. 22:13; 28:20).
  • The standalone imperative ḥazaq appears dozens of other times (Judg. 20:22; 2 Sam. 10:12; 1 Chr. 19:13; Ps. 27:14; 31:24).
• Contexts:
  • Leadership handoffs: Moses to Joshua (Deut. 31:6–7, 23).
  • Entering the Promised Land: God to Joshua (Josh. 1).
  • Building the Temple: David to Solomon (1 Chr. 28:20).
  • Facing enemies: Military exhortations (2 Sam. 10:12; 1 Chr. 19:13).
  • Spiritual perseverance: Psalms urging faith and courage (Ps. 27:14; 31:24).
• Theological thrust: Strength comes not from self but from God’s empowering presence. Often paired with the assurance of victory or success if one clings to God’s Word.

3. Overlap & Pairing

• Most common formula: “Be strong and courageous; do not fear, for the Lord your God is with you.” (Deut. 31:6; Josh. 1:9).
• These phrases almost always appear in times of transition, crisis, or divine calling. They anchor courage not in human grit, but in God’s faithful presence.

4. Why so frequent?

• Human tendency: Fear is our default when facing the unknown or the impossible.
• God’s remedy: His word of assurance realigns perspective—courage is born from confidence in His character.
• Spiritual formation: The repetition shows that God’s people constantly need reminding. Fear must be continually replaced with trust.

✅ Summary:

• “Do not fear” (or similar) → ~70–100 times, often with “I am with you.”
• “Be strong” (esp. ḥazaq ve’ematz, “be strong and courageous”) → ~10+ explicit uses, many more variations.
• Together they form the Bible’s most repeated command: God calling His people to trust Him rather than fear, to draw strength from His presence, and to act courageously in obedience.

II. 📖 Isaiah 35:4

“Say to those with an anxious heart, ‘Be strong, do not fear! Behold, your God will come with vengeance; with the recompense of God. He will come and save you.’”

1. Context of Isaiah 35

• Isaiah 35 is a vision of restoration following judgment (contrasting Isaiah 34, where nations face wrath).
• It paints a picture of desert blooming, the weak strengthened, the blind seeing, the lame leaping, and the redeemed walking on the highway of holiness.
• Verse 4 sits at the turning point: from anxiety and fear to the joyful arrival of God’s salvation.

2. “Be Strong, Do Not Fear” Together

• Isaiah combines both imperatives that echo throughout Scripture:
  • “Be strong” → internal resolve, courage in the face of weakness.
  • “Do not fear” → reassurance that dread is misplaced because of God’s presence and action.
• Unlike military settings (Joshua 1, 2 Sam. 10:12), here it applies to the spiritually weak and fearful, those overwhelmed by exile, oppression, or personal frailty.

3. Ground of Courage

• The command is not abstract. Strength and fearlessness are rooted in “Behold, your God will come”:
  • Divine vengeance: God will put wrongs right, dealing with oppressors.
  • Divine recompense: He restores balance and justice.
  • Divine salvation: Ultimately, “He will come and save you.”
• This is both immediate hope for Israel and prophetic anticipation of Messiah’s arrival (fulfilled in Jesus’ healings, see Matt. 11:4–5 referencing Isa. 35).

4. Connection with the Broader Biblical Pattern

• Just like with Abraham (Gen. 15:1), Israel at the Red Sea (Exod. 14:13), Joshua entering Canaan (Josh. 1:9), or Mary encountering the angel (Luke 1:30), God’s “do not fear” comes with a reason grounded in His presence or action.
• Isaiah 35:4 emphasizes that the end of fear is not human courage alone but the assurance that God Himself is coming to intervene.

5. Theological and Devotional Insight

• Fearless strength is not denial of weakness; it is faith that God’s arrival changes everything.
• Isaiah addresses those with “anxious hearts” → God doesn’t shame fear but speaks directly to it, transforming it into trust.
• In Christ, this verse is magnified: “Take heart, it is I; do not be afraid” (Matt. 14:27) echoes Isa. 35:4, with Jesus Himself as the arriving God who saves.

✅ Summary with Isaiah 35:4 factored in:
The repeated biblical refrain “be strong / fear not” finds a climactic expression in Isaiah 35:4. It assures the fearful and weak that strength and courage flow not from self, but from the coming of God in salvation. This becomes central in the Gospel: Jesus embodies the fulfillment of this promise—removing fear and granting courage through His presence and deliverance.

III. 1. Isaiah 35:4 as a window into God’s audience

• This means the command isn’t aimed only at warriors or leaders (like Joshua or David’s soldiers), but at the fearful, trembling, weary, and fragile—those least likely to think they can obey such a command.
• In Hebrew thought, the heart (lev) is the seat of mind, will, and emotion. An “anxious heart” signals someone whose inner life is unsettled, shaken, and easily overcome.

The verse explicitly says:

“Say to those with anxious hearts (literally: hasty, racing hearts): ‘Be strong, do not fear…’”

2. Other moments God addresses the fearful

God’s repeated “fear not” is almost always directed at those feeling anxious, weak, or inadequate:

• Abraham (Gen. 15:1) - The word of the Lord came to Abram in a vision: “Do not be afraid, Abram. I am sovereign, your reward will be great." → fearful about not having an heir.
• Israel at the Red Sea (Ex. 14:13) "Moses answered the people, “Do not be afraid. Stand firm and you will see the deliverance the Lord." → trapped and terrified.
• Joshua (Josh. 1:9) "Be strong and courageous. Do not be afraid; do not be discouraged, for the Lord your God will be with you wherever you go.”→ anxious about leading a people into hostile land.
• Gideon (Judg. 6:23) "The Lord said to [Gideon], “Peace! Do not be afraid." → insecure and doubting.
• Elijah (1 Kgs. 19) → running in despair.

Exiles in Babylon (Isa. 41:10) "Do not fear, for I am with you; do not be dismayed, for I am your God. I will strengthen you and help you; I will uphold you with My righteous right hand."

• (43:1) This is what the Lord says—He who created you, Jacob, He who formed you, Israel: “Do not fear, for I have redeemed you; I have summoned you by name; you are Mine."→ worn down by humiliation.
• Mary, Zechariah, Joseph, shepherds (Luke 1–2) → startled and overwhelmed by divine encounter.
• The disciples → in storms, after resurrection, facing persecution.
• Matt. 14:27 - Jesus immediately said to them: “Take courage! It is I. Don’t be afraid.”
• Matt. 28:10 - Jesus said to them, “Do not be afraid."
• John 14:27 - " Peace I leave with you; My peace I give you. I do not give to you as the world gives. Do not let your hearts be troubled and do not be afraid."

In each case, the command comes with a diagnosis of anxiety—God sees and names the trembling heart.

3. The gentle strength of God’s command

• To anxious hearts, “be strong” is not a demand for willpower, but an invitation to borrow God’s strength.
• “Do not fear” is not a scolding, but a soothing word of reassurance: “You don’t have to be afraid anymore, because I’m here.”
• This makes God’s repeated command less about “soldierly grit” and more about divine compassion. He is both commanding and comforting at the same time.

4. The prophetic and messianic depth

• Isaiah 35:4 anticipates the Messiah’s ministry. Jesus directly fulfills it when He says to the paralytic, the storm-tossed disciples, the synagogue ruler, and the women at the tomb: “Take heart… do not be afraid.”
• He consistently seeks out those with “anxious hearts.”

In fact, Matthew 11:28–29 (“Come to Me, all who are weary and heavy laden, and I will give you rest… you will find rest for your souls”) feels like a direct echo of Isaiah 35:4.

5. Devotional insight

When God says “be strong, do not fear”, He is:

• Identifying the anxious heart (naming their state, showing He sees them).
• Speaking courage into them (not demanding they muster it).
• Rooting their confidence in His coming (Isa. 35:4 → “Your God will come… He will save you”).

It’s less like a drill sergeant shouting, and more like a father holding a trembling child: “I know you’re afraid. Don’t be. I’m here. You can be strong because I am with you.”

✅ Summary:
Whenever God says “be strong” or “fear not”, He is most often addressing people with anxious, trembling hearts. He identifies them in their weakness, not their strength, and His words are not raw commands but reassurances of His presence and action. Isaiah 35:4 crystallizes this truth: God comforts the fearful not by denying their fear, but by naming it and overcoming it with His promised salvation.