Along with its inestimable value being proved by its divine instrumentality in the salvation of souls, the Bible’s inestimable value is also proven by the fact that it serves as the saints’ assurance of salvation.
In 1 John 5:9-13, the Apostle John speaks of how we take men at their word, despite the fact that men are often wrong and often lie. John then proceeds in this passage to admonish us to take God at His Word, since God is never wrong and never lies. Surely, John argues, if we can believe what fallible and frequently fraudulent men say, we can believe what an infallible and faithful God says.
What is it that God says about His Son Jesus Christ? It is simply this: Whoever believes in Him has eternal life. God has gone on record—the Bible—that all who trust in His Son for their salvation are promised by Him eternal life. If you’ve trusted Christ as your Savior, you can be sure of your salvation and of God’s promise of eternal life. You can know so, simply because the Bible says so!