Once the Israelites reached the promised land, they found it occupied.  Moses sent twelve men to explore the land and its inhabitants.  When they returned, ten men were fearful, and gave disheartening reports of unbeatably-powerful people and giants dwelling in large fortified cities.  The other two men, Joshua and Caleb, gave hopeful reports.  The fearlessness of Joshua and Caleb allowed them to see that God could deliver the promised land to Israel, despite the powerful warriors and fortified cities in the land.