Despite being in the promised land of milk and honey, Achan desired more and stole a year's salary from the treasury. He did what he knew he shouldn't do, because the desire of the human heart is powerful. Don't follow your heart, follow God. Sin can't be hidden forever, everything done in darkness will be brought to light. Whatever is in the dirt, God will unearth, and judgement will come like Achan in the valley of Achor. Yet, for those in Christ, we have the door of hope, and salvation from our sins.