In the dramatic moment when a divine lottery exposes a hidden sinner, the leader confronts the guilty man to draw out an explicit confession. Despite the severe nature of the offense and the heavy guilt hanging over the moment, Joshua initiates the conversation with remarkable affection and softness. He addresses the man as his son, even though there is no record of prior acquaintance between them [ביאור שטיינזלץ].
The primary approach among commentators is that the guilty man, Achan, initially attempted to undermine the credibility of the lottery system. He argued that if a lottery were drawn between the two greatest leaders of the generation—Joshua and Eleazar the Priest—one of them would inevitably be selected. Therefore, Joshua pleaded with him to confess to prevent him from slandering the lottery method, especially since this very system would soon be used to divide the Land of Israel among the tribes [רש״י, רד״ק, אברבנאל]. Even though Achan's fate was already sealed whether he denied the charge or not, his public admission was essential. It served to justify the lottery's outcome in the eyes of the people [ביאור שטיינזלץ, רד״ק] and proved to the surrounding nations that Israel's recent military defeat was the result of internal sin, rather than any lack of divine power [אלשיך].
Furthermore, the confession was necessary so that Achan's impending death could serve as atonement for him in the World to Come [רד״ק]. On a practical level, an exact admission was needed to locate the stolen goods, ensuring they would not accidentally fall into someone else's hands and remain as a forbidden presence within the camp [אברבנאל].
Joshua urges Achan to give honor to God. By ceasing his denial of the divine lottery, Achan stops profaning God's name; his admission brings honor to God by demonstrating to the nation that the impending punishment is entirely justified [מצודת דוד, מלבי״ם]. This act of honoring God is also understood as the physical return of the stolen property to its rightful owner, which is God Himself [אברבנאל]. Ultimately, Joshua is asking Achan to set aside his own personal dignity and his fear of public humiliation, prioritizing the honor of Heaven instead [אלשיך].
The demand for a confession requires Achan to admit the truth about embezzling the forbidden items [מצודת ציון, מצודת דוד], and potentially to acknowledge other similar violations he had committed in the past during the days of Moses [אברבנאל, מלבי״ם]. Joshua then asks Achan to detail exactly what he took [מצודת דוד]. Commentators note a careful distinction in Joshua's request: the core confession of the sin is directed toward God, but the specific details of the theft are to be told to Joshua privately. This deliberate separation is meant to spare Achan the intense shame of describing his actions in front of the entire nation [אלשיך, אברבנאל].
Finally, Joshua warns Achan not to conceal anything [מצודת ציון, ביאור שטיינזלץ], cautioning him against hiding any additional offenses [מלבי״ם]. He subtly reminds Achan that any attempt at deception is futile; the spirit of God rests upon Joshua, and the absolute truth will inevitably come to light [אלשיך].