How do we know the inspiration of the Bible is true?

The inspiration of the Bible is affirmed by the consistent testimony of its writers, who understood their writings to be divinely initiated. Throughout the Scriptures, there is a unified message revealing God's plan of salvation, supported by prophecies that have been fulfilled. Furthermore, the Bible itself claims to be the word of God, asserting in Isaiah 1:20 that 'the mouth of the Lord has spoken.' This divine origin gives credence to its teachings and assures believers of its truthfulness. When engaging with the Bible, we recognize that it possesses unique authority and relevance, transcending cultural and temporal contexts, and guiding believers through centuries of faith and experience.