Law

Understanding Deuteronomy 31:23 in Depth: Be Strong and Courageous


What Does Deuteronomy 31:23 Mean?

The law in Deuteronomy 31:23 defines God’s commission to Joshua after Moses’ leadership ended. It records the Lord’s direct command: 'Be strong and courageous, for you shall bring the people of Israel into the land that I swore to give them. I will be with you.' This verse marks a pivotal moment of transition and divine reassurance.

Deuteronomy 31:23

And the Lord commissioned Joshua the son of Nun and said, "Be strong and courageous, for you shall bring the people of Israel into the land that I swore to give them. I will be with you."

True courage is stepping forward when called, sustained not by strength of self, but by the unwavering presence of God.
True courage is stepping forward when called, sustained not by strength of self, but by the unwavering presence of God.

Key Facts

Author

Moses

Genre

Law

Date

Approximately 1406 BC

Key People

  • God
  • Joshua the son of Nun
  • Moses

Key Themes

  • Divine commissioning
  • God's presence with His people
  • Courage through faith
  • Leadership transition

Key Takeaways

  • God calls leaders with a promise: 'I will be with you.'
  • True courage comes from trusting God’s presence, not human strength.
  • Jesus fulfills God’s promise to be with us forever.

God’s Call to Joshua at a Critical Moment

This verse comes right after Moses prepares to pass the leadership to Joshua, as the Israelites stand on the edge of the Promised Land.

In Deuteronomy 31:1-8, Moses reassures the people that God will go before Joshua as He did before Moses. Now in verse 23, the Lord Himself speaks directly to Joshua with a clear command: 'Be strong and courageous,' not because the task is easy, but because God’s presence guarantees their future in the land He promised.

Strength and Courage Rooted in God's Presence

True courage is not the absence of fear, but the quiet step forward when God’s presence is the only promise you need.
True courage is not the absence of fear, but the quiet step forward when God’s presence is the only promise you need.

God’s command to Joshua is a divine promise that depends on His presence.

The words 'be strong' (from the Hebrew *chazaq*) and 'courageous' (*amatz*) appear repeatedly in Scripture, especially in moments of divine commissioning. In Joshua 1:6-9, the Lord repeats this exact phrase three times, showing that courage isn’t about boldness on human terms, but about trusting God’s presence in difficult tasks. Unlike other ancient nations where leadership relied on military might or royal lineage, Israel’s success was rooted in faithfulness to God’s promise, not human strength.

Be strong and courageous, for you shall bring the people of Israel into the land that I swore to give them. I will be with you.

This same call to courage echoes beyond Joshua, reminding us that following God often means stepping forward not because we feel able, but because He said, 'I will be with you.'

God’s Presence with Us, Just as He Promised

The promise 'I will be with you' that God gave Joshua applies to all believers and is fully realized in Jesus.

I will be with you.

Jesus, whose name means 'the Lord is salvation,' is 'Immanuel,' which means 'God with us,' fulfilling that same promise in Matthew 28:20: 'And surely I am with you always, to the very end of the age.' Because of Jesus, we don’t have to earn God’s presence - we receive it by faith, not by law, showing that following God today means trusting His nearness, not carrying out the old commands as Israel did.

Joshua's Commission and the Coming of Jesus, Our True Leader

True leadership flows not from human strength, but from the quiet courage born of trusting God’s ever-present promise.
True leadership flows not from human strength, but from the quiet courage born of trusting God’s ever-present promise.

The commissioning of Joshua in Deuteronomy 31:23 sets the stage for the fuller picture of leadership God would one day fulfill in Jesus.

In Joshua 1:1-9, the Lord repeats the command to 'be strong and courageous,' showing that the success of God’s people has always depended on trusting His presence, not human strength. Yet even Joshua, who led Israel into the land, could not give them final rest - something the writer of Hebrews highlights when he says, 'For if Joshua had given them rest, God would not have spoken later about another day' (Hebrews 4:8).

Be strong and courageous. Do not be afraid; do not be discouraged, for the Lord your God will be with you wherever you go.

That rest ultimately comes through Jesus, the greater Joshua, whose name means 'the Lord saves,' and who fulfills the promise of God’s presence as Immanuel - 'God with us' - leading all who trust Him into true and lasting peace.

Application

How This Changes Everything: Real Life Impact

I remember the week my doctor called with test results I wasn’t ready to hear. Sitting in that sterile room, the words blurred into fear. I had studied the Bible for years, but in that moment, theology felt distant. Then I remembered Joshua - chosen, not because he was fearless, but because God said, 'I will be with you.' That promise applied beyond battles and borders. It was for hospital rooms and hard news. I whispered it like a lifeline, and something shifted. The fear didn’t vanish, but my courage wasn’t about me - it was about trusting that God was right there, leading me through. That’s the power of Deuteronomy 31:23: it turns our trembling into steps of faith, not because we’re strong, but because He’s with us.

Personal Reflection

  • When have I faced a challenge where I relied on my own strength instead of trusting God’s presence?
  • What 'Promised Land' is God calling me toward today - something I’ve hesitated to pursue because it feels too big?
  • How can I remind myself this week that courage isn’t the absence of fear, but the choice to move forward because God is with me?

A Challenge For You

This week, when you feel afraid or unsure, speak Deuteronomy 31:23 out loud: 'Be strong and courageous... I will be with you.' Write it on a note, save it as a phone reminder, or repeat it in prayer. Let it become your anchor. Also, share this promise with someone facing a hard transition - be a voice of courage to them, as God was to Joshua.

A Prayer of Response

God, I admit I often feel weak and unsure when life gets hard. Thank you that your call on my life doesn’t depend on my strength, but on your presence. Help me trust that you are with me, as you were with Joshua. When fear whispers, remind me of your promise. Give me courage that comes not from confidence in myself, but in confidence in you. Amen.

Related Scriptures & Concepts

Immediate Context

Deuteronomy 31:22

Moses finishes writing the law, setting the stage for God’s direct commission to Joshua in the next verse.

Deuteronomy 31:24

Moses completes the book of the law, showing the transition from instruction to action under Joshua’s leadership.

Connections Across Scripture

Joshua 1:9

God commands Joshua to be strong and courageous, echoing Deuteronomy 31:23 and affirming His constant presence.

Isaiah 41:10

God reassures His people with the same promise: do not fear, for I am with you.

Hebrews 13:5

The New Testament reaffirms that God will never leave or forsake His people, fulfilling the promise to Joshua.

Glossary