The Israelites' response to Joshua marks a moment of absolute, uncompromising commitment to the Creator. They firmly reject any alternative path or condition, declaring a resolute acceptance of their duty to serve God with all its accompanying consequences. Their firm refusal to abandon Him reflects a deep intention to persist in their devotion carefully and consistently throughout their lives [מצודת דוד, ביאור שטיינזלץ].
Building on this steadfastness, their rejection also signals a complete turning away from any prior thoughts of mixed worship. They make it clear that they will not blend their devotion to God with the reverence of foreign deities, choosing instead to dedicate themselves to Him with total exclusivity [אלשיך].
Beyond the exclusivity of their worship, the nature of their commitment reveals a profound shift in their underlying motives. In earlier moments, the people referred to God using titles that implied a transactional relationship, one based on a system of reward and punishment determined by their actions. Now, they invoke God alone without these conditional titles. This shift indicates a significant spiritual elevation. The people commit to serving God purely for His own sake and because of His divine essence, entirely detached from any desire to receive a reward [מלבי״ם, אלשיך].