passage, he refers to Scripture as “unfailing truth.” The Bible, then, is the inerrant Word of God. In his Commentary on John, Aquinas claimed that “those who wrote the Scriptural canon, such as the evangelists, apostles, and others like them, so firmly asserted the truth that they left nothing to be doubted.” In the material sense he would agree with the Protestant principle of sola Scriptura, the Bible alone is the Word of God, the totally sufficient norm for our faith. He says