Any written document must be interpreted if it is to be understood. The United States of America has nine highly skilled individuals whose daily task is to interpret the Constitution. They compose the Supreme Court of the land. To interpret the Bible is a far more solemn task than to interpret the U.S. Constitution. It requires great care and diligence.
The Bible itself is its own Supreme Court. The chief rule of biblical interpretation is "sacred Scripture is its own interpreter." This principle means that the Bible is to be interpreted by the Bible. What is obscure in one part of Scripture may be made clear in another. To interpret Scripture by Scripture means that we must not set one passage of Scripture against another passage. Each text must be understood not only in light of its immediate context but also in light of the context of the whole of Scripture.
In addition, properly understood, the only legitimate and valid method of interpreting the Bible is the method of literal interpretation. Yet there is much confusion about the idea of literal interpretation. Literal interpretation, strictly speaking, means that we are to interpret the Bible as it is written. A noun is treated as a noun and a verb as a verb. It means that all the forms that are used in the writing of the Bible are to be interpreted according to the normal rules governing those forms. Poetry is to be treated as poetry. Historical accounts are to be treated as history. Parables as parables, hyperbole as hyperbole, and so on.
In this regard, the Bible is to be interpreted according to the rules that govern the interpretation of any book. In some ways the Bible is unlike any other book ever written. However, in terms of its interpretation, it is to be treated as any other book.
The Bible is not to be interpreted according to our own desires and prejudices. We must seek to understand what it actually says and guard against forcing our own views upon it. It is the sport of heretics to seek support from Scripture for false doctrines that have no basis in the text. Satan himself quoted Scripture in an illegitimate way in an effort to seduce Christ to sin (Matthew 4:1-11).
The basic message of the Bible is simple enough and clear enough for a child to understand. Yet the meat of Scripture requires careful attention and study to understand it properly. Some matters treated by the Bible are so complex and profound that they keep the finest scholars perennially engaged in an effort to sort them out.
There are a few principles of interpretation that are basic for all sound study of the Bible. They include the following: (1) Narratives should be interpreted in light of "teaching" passages. For example, the story of Abraham offering Isaac on Mount Moriah might suggest that God didn't know that Abraham had true faith. But the didactic portions of Scripture make it clear that God is omniscient. (2) The implicit must always be interpreted in light of the explicit; never the other way around. That is, if a particular text seems to imply something, we should not accept the implication as correct if it goes against something explicitly stated elsewhere in Scripture. (3) The laws of logic govern biblical interpretation. If, for example, we know that all cats have tails, we cannot then deduce that some cats do not have tails. If it is true that some cats do not have tails, then it cannot also be true that all cats have tails. This is not a matter merely of technical laws of inference; it is a matter of common sense. Yet the vast majority of erroneous interpretations of the Bible are caused by illegitimate deductions from the Scripture.