In a recent debate between myself and another Calvinist on CGR on whether or not God predestines sin, the question has been raised of whether or not logic based on Scripture is allowable and reliable. Historically, Reformed thought has been very much divided on this issue. One of the most well known reformers, Martin Luther, did not believe logic to be reliable. He even went so far as to declare that reason was the enemy of the Christian faith and that faith must, at every turn, crush reason beneath its feet. John Calvin, even, was very hesitant to use logic to extend his theology beyond the Bible’s explicit teachings. (Subsequently, this is why many have claimed that Calvin was not nearly as “Calvinistic” as some of his modern-day students.)
Meanwhile, other Reformed theologians such as Cornelius Van Til, Greg Bahnsen, John Frame, and Gordon Clark have believed that logic is perfectly valid as long as the believer has the proper epistemology (epistemology is defined as the theory of knowledge). It probably comes as little surprise that this is the side with which I agree.
Key to presuppositional apologetics is the concept of Reformed (which is, ultimately, Christian) epistemology; that is to say, the philosophical study of the nature of knowledge within Christian theism. (I should note that when I speak of Reformed epistemology, I am not speaking of the Reformed epistemology advocated by Alvin Plantinga.) There are two keys points which Reformed epistemology states.
First, Reformed epistemology states that the final arbiter of truth (definitionally, the final judge of truth) is not the creation but rather the Creator. When the two conflict in matters of truth claims, the Creator will always be right. Second, Reformed epistemology states that the Bible is the divine revelation of that final arbiter of truth to His creation. As the divine revelation of the final arbiter, it is, by extension, the revelation of the final truth. This cannot be over-emphasized: the Bible must always be the final judge of truth.
Now, according to Reformed epistemology, the laws of logic exist as a reflection of God. God is, necessarily and by nature, a logical God; He cannot deny Himself (law of non-contradiction) and is immutable (logical consistency). Therefore, we see that indeed logic, a reflection of God’s nature, exists necessarily because God exists.
Knowing all this background, it should begin to make sense as to why I believe logic should certainly be allowed in theology. As long as the believer does not believe himself to be the final arbiter of truth, then it is rational and reasonable to use logic in theology.
A common complaint that those opposed to the use of logic raise is that ultimately those who use logic exalt it as the authority above the Bible. Plainly, though, under the Reformed epistemic system, this can never be the case because doing so would mean divorcing one’s self from the entire Biblical epistemic system. In short, logic must always be in submission to the Bible and changing that order of authority asserts that the believer knows better than God.
Now, the question is raised of how far we may take logic in the study of the Biblical God. Obviously, we must use logic to a certain extent to derive our beliefs so at this point the question becomes, “How much we allow ourselves to extrapolate?” Those opposed to the use of logic in this manner would say that extrapolating too much destroys the need for faith and results in heretical beliefs. A classic example would be the beliefs of Modalists or Oneness Pentecostals. Modalists and Oneness theology claim that God is one person with three separate personalities (the Father, the Son, and the Holy Spirit). A key argument which they (Oneness and Modalists) use is that the traditional Trinitarian view contradicts logic and is, therefore, invalid. Note, though, that in declaring that view, they divorce themselves from Biblical epistemology. They presume that there is a final decider of truth outside of the Bible. If the Bible does not appear to be logical, they assert, then the fault must be in the Bible and not us.
Furthermore, how are differences between interpretations resolved but by logic? Ultimately, all of our Biblical beliefs are based on our ability to derive truth via logic from the Bible. Our faith can never be completely free of logic.
In short, my point is this: the use of logic is very valid in theology; in fact, it is a requirement for any study of theology. However, believers must be careful not to reason as though they and their (presumed) rational mind is the final authority. In other words, we must not let our logic “correct” the Bible, but rather the other way around. When logic says one thing and the Bible says another, the Bible always wins.
Now I’m put in an interesting position. A few posts ago, I declared that, “I’d love to believe total inerrancy but cannot honestly do so now.” For anyone who cares, consider this a formal retraction of that statement. Perhaps in my next post I’ll take the time to write a refutation of my argument.