"No doubt the Romish claim [to magisterial infallibility of the church] is reprehensible; but orthodox Protestants must not immediately dismiss all further concern. They must ask whether in in their own thought, buried below the surface, a claim to infallibility is made. This is not an easy question to answer. On the one hand, the Calvinist is most ready to acknowledge his sinfulness and ignorance; the heart even of the regenerate is deceitful above measure; and God has not promised him freedom from error. The Westminster Confession asserts that even 'councils may err and many have erred.' On the other hand, Scripture is perspicuous; it was addressed to ordinary people, the poor, the slaves, the uneducated in Corinth and Rome. God obviously intended that they should understand it. How can an ordinary person make a mistake when he says that the Bible teaches the virgin birth? How could a Roman slave or a Corinthian businessman be confused as to the fact that the New Testament says that Christ rose from the dead? Is not everyone infallible on these simple points?"
Gordon H. Clark, Karl Barth's Theological Method, (Unicoi: Trinity Foundation, 1997), pp. 143-144.