What are the Clarification of why the historical context and literary context are so important to understand in properly interpreting the epistles?

In the history of interpretation, the rise of the historical-critical method opened a new era. The search for the original meaning in the epistles can lead to putting Words back into the past- before historical context changed the meaning of Words- and can mis true the meanings. This overall means that since there have been studies showing that some Words may have meant different things in the past, we have to be careful not to confuse Words that meant something in one century and mean something completely different in another. For instance, gay used to mean happy. Now people look at this as an orientation due to our historical past and legal system that was almost in existent in the past. Everything that helps us better to understand the truth and to appropriate its representations is helpful and worthwhile for theology. It is in this sense that we must seek how to use this method in theological research. Everything that shrinks our horizon and hinders us from seeing and hearing beyond that which is merely human must be opened up. Thus the emergence of the historical-critical method set in motion at the same time a struggle over its scope and its proper configuration which is by no means finished as yet.