There was sin in the camp when Israel went up against Ai, and this was the cause of their defeat. The whole people suffered, not simply because of Achan’s sin, but because all had sinned. “Behold, his soul which is lifted up is not upright in him; but the just shall live by his faith.” 1Habakkuk 2:4. Whether they were blinded by “the deceitfulness of sin,” and then became exalted in their minds, or whether their self-exaltation led to their sin, is not material; certain it is that the people had given place to sin, and had become self-confident, which is in itself sin. Because of sin they suffered defeat; so long as sin was given a place in their hearts, they could not go on with the conquest of the land; and this again proves that the promised inheritance, into which God was leading them, was such as could be possessed only by righteous people—those who had the righteousness of faith. EVCO 381.1