How do we know God preserves His remnant people?

Isaiah teaches that despite the widespread desolation and the judgment that God brings upon the earth, there exists a remnant according to the election of grace. This remnant is likened to the gleanings of an olive tree or grapes after the harvest—few in number but preserved by God. His faithfulness assures believers that amid chaos and judgment, they are not abandoned. God's grace continuously sustains and protects His chosen people, allowing them to remain as witnesses to His truth and power. The assurance of God's preservation leads to hope, illustrating that His purposes will prevail, and His church will continue to endure, even when the world seems turned upside down.