When they failed to obey God they thought they had failed to obey the law of God, they had no idea what caused the disobedience.
No man did, that is a main point in OP to show until Paul we knew nothing about a nature.
They knew they sinned but didnt know why, Romans 7:14-15
13 Was then that which is good made death unto me? God forbid. But sin, that it might appear sin, working death in me by that which is good; that sin by the commandment might become exceeding sinful.
14 For we know that the law is spiritual: but I am carnal, sold under sin.
Paul describes the sin-nature for the first time in Romans 7.
He can look at it retrospectively because of standpoint of in Christ now.
No man did, that is a main point in OP to show until Paul we knew nothing about a nature.
They knew they sinned but didnt know why, Romans 7:14-15
13 Was then that which is good made death unto me? God forbid. But sin, that it might appear sin, working death in me by that which is good; that sin by the commandment might become exceeding sinful.
14 For we know that the law is spiritual: but I am carnal, sold under sin.
Paul describes the sin-nature for the first time in Romans 7.
He can look at it retrospectively because of standpoint of in Christ now.