Some things can ONLY be defined – or understood – in terms of what they are NOT. Such is the case regarding the Biblical usage of the flesh. Theologians and Bible teachers have attempted to determine its meaning for centuries, yet the confusion continues as to any real understanding. In his use of the phrase, the flesh, Paul referred to the emptiness of the shell of humanity, not that the actual flesh, skin, blood and bones were evil in themselves. I say we can hear more if we listen not for a meaning but for a lack of one. That lack represents the emptiness of the whole history of mankind as it has sought to fill the void with anything except the only reality that can fill it.
How can you realize the freedom you have in Christ? I say that you will discover it, more times than not, in the midst of the bondage that still seems to hold you down. You see, the power of the gospel is not found merely in the words of its testimony of Jesus’ death and resurrection, it is found in the reality that has been brought about because of who he is and what he has done. That reality is that Christ is in you. He is there, and his life witnesses from within you … despite all the doubts that you think actually come from within you. source