The Struggle Within

If we are going to follow the desires of the flesh, we will be ruled by the sin nature within us; however, because we are saved in our spirit, we can serve God with our minds and no longer be subject to the law of the sin and the death.

For we intuitively know that the law is logical, but I, on my part, am fleshly, having been sold under the sin [nature]. For that which I (old nature) work out, I (new nature) do not experientially know, for that which I (new nature) do not desirously will, this I (old nature) practice, but that which I (new nature) am indifferent to, this I (old nature) do. But since that which I (new nature) do not desirously will, this I (old nature) do, I (new nature) together say with the law that [the law is] proper. But now I (new nature), on my part, no longer work it out for myself, but the dwelling in me sin [nature]. For I (new nature) intuitively know that dwelling in me, that is in my flesh, is no good. For the desirous will is present with me (new nature), but the working out of the proper, it is not found. For not that which I (new nature) desirously will, to do good, but that bad which I (new nature) do not desirously will, this I (old nature) practice. But since that which I (new nature) do not desirously will, this I (old nature) do, it is no longer I (new nature) working out it, but the sin [nature] residing in me. - Romans 7:14-20

Then I find the law to desirous will in me to do the proper, that in me the bad is present. For I delight in the law of the God according to the inner man, But I see a different law in my members making war against the law of my mind and leading me into captivity to the law of the sin [nature], the one being in my members. I am a wrenched man. Who will rescue me out from the body of this death? I thank God through Jesus Christ our Lord; therefore then, I myself on the one hand with the mind serve God, on the other hand with the flesh [serve] a law of sin. - Romans 7:21-25