Unbelief is choosing to trust what we see instead of what God has promised. The story of the Israelites at Kadesh Barnea illustrates this perfectly - while ten spies focused on giants and obstacles, Joshua and Caleb saw the same challenges but trusted in God's power. Unbelief magnifies problems and makes us romanticize our past instead of embracing God's promises for our future. Faith doesn't ignore reality; it includes God in the equation. When facing difficulties, we must shift our focus from the problem to the problem solver, remembering God's faithfulness and trusting His promises over our circumstances.