Chuck Smith emphasizes God's unwavering promises to Israel as outlined in Leviticus 26, detailing the blessings of abundance, peace, protection, and provision that come with obedience to His commandments. He warns of the dire consequences of disobedience, including crop failures and desolation, while also highlighting God's assurance of restoration in the last days and the return of Jesus. The sermon underscores the importance of faithfulness to God's statutes and the hope of redemption and glory that awaits His people.