For the Christian there is no Christ but the Christ of the Bible (specifically, of the New Testament teachers) and no understanding of the Bible but that which matches the expressed mind of Christ and his apostles (specifically, as they interpret the Old Testament and relate themselves to it).
As regards authority, it is impossible to give too much weight to the fact that Jesus, who was himself God speaking, would have consistently viewed the words of his Bible as God speaking and should have lived his life and fulfilled his vocation of teaching and suffering in direct and conscious obedience to what was written. Now, in effect, from his throne he tells all who would be his disciples that they must learn from him and follow his example at this point and submit to becoming disciples of the canonical Scriptures. His authority and the authority of the Scriptures upon us are one. What then should we do? We should look to the Holy Spirit, who inspired the biblical text and who authenticates it to regenerate hearts as God-given by sensitizing us to the impact of its divinity, to make clear to us not only what God said in and through the text to its original readers but also what he says to us via the same text here and now. We should ask for the Spirit's illumination, especially for our attempts at applicatory thinking. --JI Packer