What is meant by the body? The first question concerns the nature of body. What does Paul mean here? The Greek word is different than the word previously translated flesh in verse 12, and in the first line of verse 13, there the word is sarx, here it is soma. Both sarx and soma are common New Testament words, each being used over 140 times. I think Paul is doing something unique, linguistically, here. He is implementing a literary technique that he has used before, and he is wrapping together his Greek and Hebrew heritage into one packaged statement that is full of depth and profundity. Paul is using parallelism to teach us something about our sin nature. If you consider the range of New Testament usage of these two words, sarx and soma, what you will find is that sarx tends to be more metaphysical or theoretical, while soma tends to be more biological or medical. In other words, sarx refers to the body as an idea, while soma refers to the body as an object. This helps us understand Paul when he speaks of the flesh so frequently in his letters, as almost being something that takes on qualities beyond just the basics of biological reality and becomes more abstract or ideological. Soma on the other hand tends to be more of a medical or biological term, and interestingly enough, this is a favored word of the most well-known doctor in the Bible, Luke. All of this to say, when Paul says that we are not to live according to the flesh, but instead put to death the deeds of the body, he is saying that mortification must be whole-person mortification. There are internal parts of mortification and internal parts of mortification. We’ll talk about that later, but for now, we need to understand that Paul intends here for us to understand that the body and flesh he speaks of is the whole scope of natural, sinful, fallen human existence. John Owen again summarizes brilliantly: “The body, then, here is taken for that corruption and depravity of our natures whereof the body, in a great part, is the seat and instrument, the very members of the body being made servants unto unrighteousness thereby.” (John Owen, The Works of John Owen, ed. William H. Goold, vol. 6 (Edinburgh: T&T Clark, n.d.), 7.) The nature - flesh - is corrupt, and so also the seat of the nature - the body - is also corrupt.