Walking Through the Bible: A Look at Giant Killers

Lesson Title: Joshua: The Giant of Hidden Sin

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Background Passages

• Joshua 7–8 – Achan’s sin, Israel’s defeat at Ai, and conquest after obedience

• Joshua 22–24 – Joshua’s final speeches and covenant renewal

• Deuteronomy 31:7–8 – God’s charge to Joshua

• 1 Corinthians 10:11 – Lessons from Israel for modern believers

 

Key Scriptures

• Joshua 7:1 – “But the children of Israel committed a trespass in the accursed thing…”

• Joshua 7:10 – God confronts Joshua about the sin in Israel.

• Joshua 8:1 – God encourages Joshua to be strong and courageous.

• Joshua 8:18–19 – Israel obeys God’s strategy to conquer Ai.

• Joshua 23:11–13 – Warning against compromise and idolatry

• Joshua 24:14–15 – “Choose you this day whom ye will serve.”

 

Central Verse

Joshua 24:15 (KJV) –
"…but as for me and my house, we will serve the LORD."

 

Key Terms

• Giant – Any obstacle, opposition, or system that resists God’s promise and intimidates God’s people.

• Obedience – Submission to God’s instructions regardless of personal understanding (1 Samuel 15:22).

• Accountability – Willingness to confront, confess, and correct sin for restoration (Galatians 6:1).

• Covenant Faithfulness – Consistent, intentional commitment to God’s commands and promises (Joshua 24:14).

• Consequence – The result of disobedience or sin affecting individuals and communities (Joshua 7:1–26).

 

Introduction

Even victorious giant killers face unexpected setbacks. After the miraculous fall of Jericho, Israel expected a continued string of victories, but they were defeated at Ai. The cause? Hidden sin—Achan had taken forbidden items from Jericho. This lesson reveals a critical truth: giants often fall only after confronting internal disobedience, accountability is exercised, and faith-driven action resumes.

Joshua’s later life demonstrates the enduring importance of covenant faithfulness. Before his death, he called Israel to renew their commitment to God and warned them against compromise. Joshua’s example reminds us that leadership, obedience, and courage are ongoing practices, not one-time events.

 

Discussion

 

I. Achan’s Sin and the Defeat at Ai (Joshua 7)

After Jericho, Israel assumed victory would continue. But one hidden sin brought public defeat, showing that disobedience in a community can hinder God’s plans.  

 

Achan’s sin was not just a personal failure—it became a corporate issue that affected the entire nation. Although only one man took the forbidden items, all of Israel experienced defeat at Ai. This reveals a powerful spiritual principle: what is hidden in one life can impact the whole body. In the same way, when believers harbor unconfessed sin, it can hinder unity, weaken spiritual strength, and open the door for defeat. God had already given Israel victory, but their success was conditional upon obedience. This teaches us that past victories do not guarantee future success if we abandon God’s instructions.

 

Furthermore, Achan’s actions demonstrate the danger of gradual compromise. The Bible shows a progression—he saw the garment, coveted it, took it, and then hid it. Sin often begins with a glance and grows into disobedience when it is not immediately resisted. Many believers do not fall suddenly; they drift slowly through small compromises that seem insignificant at first. This passage challenges us to examine our hearts and remove anything that does not align with God’s will. Just as Israel could not move forward until the sin was addressed, we too must confront and repent of hidden issues before we can experience continued victory in our spiritual walk.

 

Key Teaching Points

1. Hidden sin has consequences – Achan’s theft delayed Israel’s victory (Joshua 7:1–12).

2. God reveals the root of the problem – Joshua was confronted by God, demonstrating the importance of spiritual discernment (Joshua 7:10–11).

3. Accountability restores favor – Once Achan confessed and was dealt with, Israel could resume victorious battle (Joshua 7:25–26).

Cross References

• Galatians 6:1 – Restoration requires accountability

• 1 John 1:9 – Confession brings forgiveness and cleansing

• James 5:16 – Praying for one another restores the community

Giant Identified

• Hidden sin, selfishness, secrecy, and the temptation to compromise God’s commands

Questions for Thought

1. How did Achan’s sin affect the entire nation of Israel?

2. Why is accountability important in leadership and community?

3. How does this event illustrate the principle that giants often fall only after confronting internal obstacles?

Life Application

Many believers face “Ai-like” defeats in life because of hidden sin, unresolved conflicts, or compromise. This could appear in relationships, finances, work, or spiritual walk. Just as Israel could not progress until the sin was addressed, we cannot advance in God’s promises while disobedience remains unchecked. Confession, restitution, and obedience are essential steps to reclaim victory.

 

II. Conquest of Ai: Victory Through Obedience (Joshua 8)

Once Israel confronted the giant of disobedience, God provided a strategy for victory. Obedience to God’s instructions—marching quietly, ambushing Ai, and following divine guidance—brought success.

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This victory at Ai also reveals that God not only restores His people after failure, but He reaffirms His promises when obedience is renewed. Unlike the defeat in Joshua 7, where Israel moved forward without seeking God, Joshua 8 shows a leader who follows divine instruction step by step. The strategy may have seemed unusual—retreating first, setting an ambush, and waiting for the right moment—but it demonstrates that God’s ways are often different from human logic. True victory comes not from strength or numbers, but from alignment with God’s voice. This reminds believers that after repentance, we must remain sensitive to God’s direction, trusting that His plan—no matter how unconventional—will always lead to success.

 

Key Teaching Points

1. Faithful obedience restores victory – Israel followed God’s plan carefully and was victorious (Joshua 8:1–18).

2. Preparation and strategy matter – God’s instructions required precision and discipline, emphasizing God’s wisdom over human reasoning.

3. Victory results from God’s power, not human might – The fall of Ai demonstrates reliance on God, not tactics alone.

Cross References

• Psalm 37:5 – Commit your way to God for success

• 2 Chronicles 20:15–22 – Victory through obedience and praise

• Hebrews 11:33 – Faith brings conquest over obstacles

Giant Identified

• Fear, discouragement, and reliance on human understanding instead of God’s strategy

Questions for Thought

1. How did obedience to God’s strategy lead to victory at Ai?

2. What does Israel’s success teach about the relationship between faith, obedience, and triumph?

Life Application

Believers often face repeated challenges until hidden obstacles are addressed. Success requires alignment with God’s instructions, discipline, and faith-driven action. Whether confronting career setbacks, family challenges, or personal sins, the principle remains: giants fall after accountability, preparation, and obedient movement.

 

III. Joshua’s Final Speeches and Covenant Renewal (Joshua 22–24)

Joshua’s last ministry acts highlight the importance of covenant faithfulness. He reminds Israel that obedience is not optional and challenges them to choose whom they will serve (Joshua 24:14–15).

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Joshua’s call to “choose you this day whom ye will serve” was not directed at unbelievers, but at a people who had already experienced God’s power. This shows that covenant faithfulness is not a one-time decision, but a continual commitment. Joshua rehearsed God’s faithfulness—from deliverance out of Egypt to victories in the Promised Land—to remind Israel that their obedience should be a response to what God had already done. In the same way, believers today must intentionally renew their commitment to God, especially after seasons of blessing. Spiritual success can sometimes lead to complacency, but Joshua’s words challenge us to remain vigilant, to reject compromise, and to serve the Lord with sincerity and truth.

 

Key Teaching Points

1. Leadership includes accountability and encouragement – Joshua encouraged returning tribes and maintained unity (Joshua 22).

2. Faithfulness prevents compromise – Joshua warned against idolatry and worldly influence (Joshua 23).

3. Renewal of commitment strengthens the community – Covenant renewal at Shechem was both personal and communal (Joshua 24:14–28).

Cross References

• Deuteronomy 6:5 – Love God with all your heart as an ongoing commitment

• 1 Corinthians 10:13 – God provides a way to overcome temptation

• Revelation 2:10 – Faithfulness unto the end brings reward

Giant Identified

• Complacency, temptation, divided loyalty, and forgetfulness of God’s past faithfulness

Questions for Thought

1. How does Joshua’s challenge at Shechem apply to our lives today?

2. Why is covenant faithfulness a lifelong practice rather than a one-time event?

3. How can believers guard against complacency and compromise?

Life Application

• Evaluate your daily choices: Are they aligned with God’s commands?

• Renew your personal commitment to God through prayer, Scripture, and intentional obedience.

• Model faithfulness in your family, church, and workplace.

Key Takeaways

1. Hidden sin affects the community and delays God’s promises.

   • Like Achan, personal disobedience or compromise can hinder not just individual progress but the advancement of God’s purposes in your life and those around you.

2. Obedience and faith-driven action unlock God’s victory.

   • Israel’s triumph over Ai shows that giants fall not by human strength alone but by following God’s instructions and moving in faith, even after failure.

3. Accountability restores favor and enables progress.

   • Confronting sin, seeking restoration, and embracing correction are essential for spiritual growth and community blessing.

4. Covenant faithfulness requires daily, intentional choices.

   • Joshua’s final challenge reminds believers that spiritual victory and influence depend on consistently choosing God over compromise, distraction, or complacency.

 

Conclusion

The story of Achan, the Battle of Ai, and Joshua’s final speeches reminds us that spiritual victories are often preceded by confronting internal giants—sin, fear, and compromise. Giants do not fall simply because we desire success; they fall when we align with God’s presence, obey His instructions, embrace accountability, and renew our covenant commitment daily.

Joshua’s life teaches us that leadership, courage, and faithfulness are not one-time acts—they are lifelong disciplines. Defeat can become a teacher, obedience becomes the pathway to victory, and covenant faithfulness ensures lasting influence.

As believers today, we are called to examine our hearts, confess hidden sins, and choose God daily. Like Israel, we may face setbacks, but God’s promises remain, and victory is assured for those who move in obedience, courage, and faith.

 

Declarations

• I will confront and overcome the giants of sin, fear, and compromise in my life.

• I will obey God’s Word and follow His instructions, trusting Him for victory.

• I will embrace accountability and confession to restore favor and advance in God’s promises.

• I choose today to serve God faithfully and remain steadfast in covenant commitment.

 

Closing Prayer

Heavenly Father, thank You for the lessons from Joshua and Israel’s victories and defeats. Lord, give us courage to confront the giants in our lives, whether sin, fear, or compromise. Help us to obey You, embrace accountability, and walk faithfully in covenant relationship with You. Let our choices bring glory to Your name, and may we influence others to serve You wholeheartedly. In Jesus’ name, Amen.

 

Reflection Questions

1. Are there “hidden giants” in your life that may be hindering progress?

2. How do you respond to accountability and correction?

3. In what areas can you renew your covenant with God today?

4. How can your actions influence the faithfulness of those around you?