What does it mean to have eternal security in Christ?

The concept of eternal security assures believers that once they are genuinely saved, they cannot lose their salvation. Revelation 3:5 states that those who overcome will not have their names blotted out of the Book of Life, signifying God's promise of preservation. Additionally, John 10:28-29 illustrates this by stating that Jesus gives eternal life to His sheep and they shall never perish, emphasizing that no one can snatch them out of His hand. This assurance is rooted in God's unchanging nature and His faithfulness to complete the work He begins in us, bringing comfort and stability to believers.