Therefore Man is not responsible for the action of the will. Therefore Man cannot sin against God.
Christians speak of the will as if it were a kind of separate soul, a "little cherub who sits up aloft" and gives the man his course.
Let us accept this idea of the will. Let us suppose that a separate soul or faculty called the will governs the mind. That means that the "little cherub" governs the man.
Can the man be justly blamed for the acts of the cherub?
No. Man did not make the cherub, did not select the cherub, and is obliged to obey the cherub.
God made the cherub, and gave him command of the man. Therefore God alone is responsible for the acts the man performs in obedience to the cherub's orders.
If God put a beggar on horseback, would the horse be blamable for galloping to Monte Carlo? The horse must obey the rider. The rider was made by God. How, then, can God blame the horse?
If God put a "will" on Adam's back, and the will followed the beckoning finger of Eve, whose fault was that?
The old Christian doctrine was that Adam was made perfect, and that he fell. (How could the "perfect" fall?)
Why did Adam fall? He fell because the woman tempted him.