How do we know God's promises for believers are true?

The truth of God's promises is affirmed in Scripture as it reveals His unchanging nature and sovereignty over salvation and life. For instance, in Romans 8:28, we are assured that all things work together for good for those who are called according to His purpose. This means that our salvation, our justification, and our glorification are secured in Christ, demonstrating that what God has promised will never fail. Our hope relies not on personal merit but solely on the grace and faithfulness of God.