For example, there is a difference between an encyclopedia and a commentary. There is a difference between a media guide and a short story. They are different because each has a different purpose. There are even forms within the forms. And yet they are all part of the form of a newspaper.
Forms are the vehicles that carry our messages to each other.
The messages of the Bible are also in forms. Each form has a particular purpose and function in the hearts of its original audience. The task of biblical preaching is to prepare the sermon to accomplish a similar purpose in the hearts of the contemporary audience. Content has to do with the meaning of words, symbols, and grammar within the text. Once questions of context, form, and content have been answered, the preacher will move to theological reflection on the text.