Here is an article on the Mosaic Law, expounding more upon it in relation to the viewpoint of rabbinic Judaism, and how it interacts with the Gospel of grace through faith alone, as well as the dynamics between the coming of the New Covenant as the Old Covenant is phased out.
Also, with regards to the previous article on the Sabbath, I have added something which had slipped my mind then, which is very pertinent for our discussion on the Sabbath. The verse I overlooked in haste is
And he [Jesus] said to them, “The Sabbath was made for man, not man for the Sabbath" (Mk. 2:27)
This should put to an end to all forms of legalism with regards to the Sabbath, but sadly it doesn't.