How do we know God's testimony is true?

We can know God's testimony is true because it is both recorded in the Scriptures and also affirmed in the hearts of those who believe. As mentioned in 1 John 5:10, anyone who believes in the Son of God has this testimony in their hearts, indicating an internal affirmation of the truth of God's Word. Furthermore, the consistency of the message about Christ throughout the Bible reinforces its truth. The Holy Spirit plays a vital role in making this testimony a living reality within believers, ensuring that their faith is rooted in the truth of the Gospel.