What does the Bible say about eternal salvation?

Eternal salvation is a central theme in the Bible, emphasized in Hebrews 5:9, which declares that Christ, having been made perfect, became the author of eternal salvation to all who obey Him. This salvation is not merely a temporary state; it is rooted in God's eternal design and purpose. Before the foundation of the world, God ordained a plan for salvation that includes the sending of His Son, Jesus Christ, to fulfill the law and offer Himself as a perfect sacrifice. Eternal salvation affirms that once a person is genuinely saved, they cannot lose that salvation, emphasizing the sovereignty and faithfulness of God in keeping His promises across eternity.