How does the Law provide the power of sin, which is the power to cause death.
Transgression of the Law, knowingly or unknowingly is sin, thus results in the consequence of sin, which is separation from God, spiritual death so to speak.
And the law can refer to the specifics given in our inspired scriptures, or more generally, any requirement of God. Thus before the Law of Moses was given, death as a consequence of sin (violation of God's requirement] reigned. Thus in the general sense, the "law" is spiritual.
(For until the law sin was in the world: but sin is not imputed when there is no law.
Nevertheless death reigned from Adam to Moses,
even over them that had not sinned after the similitude of Adam's transgression, who is the figure of him that was to come.
and when the fulness of time did come, God sent forth His Son, come of a woman, come under law, that those
under law he may redeem, that the adoption of sons we may receive;
What are all of flesh being redeemed from? Is it not, the death, that Adam brought forth when he transgressed, the law, he was given?
From Gal 3:22 but the Writing did shut up the whole under sin,
From John 3:6 that which hath been born of the flesh is flesh,
I have asked before why was man [Adam] made a little lower than the angels?
Was it for the purpose of being sold under sin by Adam's transgression of the first law of sin and death because of redemption
foreordained before the foundation of the world?
And so it is written,
The first man Adam was made a living soul; the last Adam
was made a quickening spirit.
Howbeit that
was not first which is spiritual, but that which is natural; and
afterward that which is spiritual.
The first man
is of the earth, earthy: the second man
is the Lord from heaven.
After, what, is that which is spiritual?
Does the Spirit of adoption bring forth the adoption, to whit?
Why do we groan within ourselves? Is this as groaning and travailing within ourselves ?
he who is doing the sin, of the devil he is, because from the beginning the devil doth sin;
for this was the Son of God manifested, that he may break up the works of the devil; 1 John 3:8 YLT
Heb 2:14 YLT Seeing, then, the children [of man, Adam] have partaken of flesh and blood, he himself also in like manner did
take part of the same, [manifested] that through [the] death he might destroy him having the power of [the] death -- that is, the devil --
As to the rest, my brethren, be strong in the Lord, and in the power of his might; put on the whole armour of God, for your being able to stand against the wiles of the devil, because we have not the wrestling with blood and flesh, but with the principalities, with the authorities, with the world-rulers of the darkness of this age, with the spiritual things of the evil in the heavenly places;
I believe the fight is between the light and the darkness of this age, between God and the devil and we are caught in the middle, yet God has given us armour for protection.
It appears to me Job was just caught in the middle only God had chosen Job as his servant and nothing the devil could do would change that truth.