"The Law," that is the "Ten Commandments" (Exo 34:28), is simply an expression of the righteous character and nature of our Holy Lord Himself. Therefore, Paul writes, "the Law is holy" (Rom 7:12).

Fallen mankind, being in the lineage of fallen Adam, inherently possesses the "knowledge" of "the Law" (Rom 2:14) in their soul's "mind" (Rom 7:23).  All men hear "the law" by their "conscience bearing witness" (Rom 2:15). Though Adam was originally created in innocence and without knowledge of "the Law," this inherent "knowledge" was gained illicitly when Adam rebelled against God's one verbal instruction, which was  not to eat of "the Tree of Knowledge of Good & Evil." All mankind, as descendents of Adam, now possesses this "knowledge." Thus, Paul writes that every man is  not ignorant, and therefore is "without excuse" (Rom 1:20).

Then also, something much more occurred when Adam ate of the "Tree of Knowledge of Good & Evil." Originally, Adam was created as a living vessel to ultimately take into his spirit the very life and nature of God Himself as seen in "the Tree of Life." The earth had already come under the hand of Lucifer, the false deity, who was then and now still is  "the god of this world" (2Cor 4:4). God intended that, through Adam, He would dispense Himself into mankind and ultimately, justly, recover "dominion" over the earth through them. When Adam ate of the "Tree of Knowledge" he simultaneously took into his body's "flesh" the "sin-nature" (Eph 2:3) of the Sin-Spirit, Satan.

"Wherein in time past ye (Christians had) walked according to the course of this world, according to The Prince Of The Power Of The Air, THE SPIRIT that now Worketh IN the children of disobedience:" (Eph 2:2)

After Adam's innocence ended in rebellion, Adam then possessed a "nature" in his "flesh" that would make his desires "the desires of the (sinful) flesh," sinful desires that are in accord with the very nature of "Sin." Adam passed these to us as the offspring of his flesh body.

"Among whom also we all had our conversation (manner of living) in times past In The Lusts Of Our FLESH, Fulfilling The Desires Of THE FLESH And of The Mind; and were By NATURE the children of wrath, even as others. (Eph 2:3)

Note that when Paul uses the term "Sin" he is most often using it as a noun, to delineate the proper name of a force, as if he is referring to a deviant personality. Paul does not use "Sin" as a verb unless Paul is referring the "act of sinning." Thus, "Sin" is the Sin's nature that Paul says indwell "the flesh" of the human body "members" (Rom 8:3b, 7:5) of every person born of the line of Adam - that's all of us.

"When we (Christians) were in (in accord with) the Flesh, the Motions of Sins (sinful appetites)... Did Work IN Our Members" (Rom 7:5)

The Sin-nature that indwells "the flesh" body of man opposes every man who would try to live in accord with their "knowledge of Good & Evil." Man's "sin-nature" is expressed through his "carnal (fleshly) mind," which remains always at "enmity against God." Unregenerate men, those without Christ's life, may at times do what appears  good, but its always out of the wrong motive of pride, or out of an ultimate self-interest, thus their works are not genuine and do not honor the Lord. These are "dead works" (Heb 6:1).

"...the (soul's) Mind set on the Flesh is death..." ⁷the Carnal Mind (the mind of "the flesh") Is Enmity Against God: for it is NOT Subject To The Law Of God, Neither Indeed Can Be. (Romans 8:6-7)

The fact is that Christ Himself is the only Righteous One. His nature is of love toward others, as a "giver." All men are "conceived in Sin" and are by their fallen nature of "lovers of self" and therefore "getters."

Yet, among men today, only those in whom Christ's "Spirit of life" comes to dwells are able to live in accord with His righteous "divine nature" (2Pet 1:4), serving Him out of His "love" in them. This is because among men today only believers have Christ's own "Spirit of life," and thereby His very "nature," working within their human "spirit," to prompt, guide and empower them in expressing His life and righteousness.

"But ye (the believers) are not in the flesh, but in The Spirit, if so be that the Spirit of God dwell (abides) in you. Now If Any Man Have Not The Spirit Of Christ, He Is None Of His. ¹⁰ And if Christ be In You, the body (to God) is dead because of sin; but the Spirit is life (Zoë, God's life) because of righteousness. (Romans 8:9-10)