The sermon examines Joshua's three commands following the fall of Jericho, focusing on the dedication of spoils to God, the preservation of Rahab, and the destruction of the city. It addresses common objections regarding divine judgment by emphasizing God's absolute sovereignty and the Canaanites' willful suppression of general revelation. The speaker highlights Rahab's inclusion as a testament to God's mercy for Gentiles and sinners who exercise faith. Finally, the message applies these historical events to modern believers, urging them to wage spiritual warfare through love and the gospel rather than worldly means.