The Bible can be the ultimate authority because it is the Word of God. We all agree, Protestant and Catholic, that it is the infallible Word of God. I believe it to be my ultimate authority because it holds forth a clear , permanent, unchanging, reliable, standard for what to believe and how to live. It clearly sets forth truth and identifies error. And its message, that the central figure from Genesis to Revelation, our Creator Jesus Christ, is a loving merciful gracious Saviour Who desires more than anything else that we know Him, that “To the law and the testimony. If they speak not according to this word, there is no light in them” Isaiah 8:20
The scriptures are our safeguard against false teachers and the delusive powers of the spirits of darkness. Satan employs every possible means to prevent men from coming to a knowledge of the Bible; for its plain utterances reveal his deceptions.
**2 Timothy 4:3 For the time will come when they will not endure sound doctrine; but after their own lusts shall they heap to themselves teachers, having itching ears;4 And they shall turn away their ears from the truth, and shall be turned unto fables
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We are now living in the last days of earth’s history. Jesus is coming back in this generation, and the above text is now being fulflled. The time Paul spoke of is now fully come. Multitudes do not want Bible truth, because it interferes with the desires of the sinful world-loving heart, and Satan supplies the deceptions they love.