"For we know that the law is spiritual: but I am carnal, sold under sin. For that which I do I allow not: for what I would, that do I not; but what I hate, that do I." Romans 7:14-15 (KJV)
The law of the flesh is probably best assigned to that tendency there, not the ethics of the Torah. Law (nomos) can sometimes mean 'way of functioning/operating' 'principle.'