How do we know that the Bible is self-authenticating?

The concept of the Bible being self-authenticating suggests that it does not require external validation to be recognized as God's Word. In 1 Thessalonians 2:13, Paul expresses gratitude because the Thessalonians received his message not as mere human words but as the very Word of God, which performs effectively in those who believe. This illustrates that its authority and truth are grounded not in church confirmation but in the intrinsic power of the Scriptures themselves. Importantly, the church is called to uphold Scripture, continually aware of its authority over all teachings and practices, thus embedding its self-authenticating nature within the hearts of Christians.