Due to some objections presented to me (rather, to my wife, who in turn brought the material to me), I've been studying a bit on the topic of the moral law, summarized in the Ten Commandments, as a rule of life for the Christian. In my research, I bumped into Samuel Bolton, who served on the Westminster Assembly. I pass this along, hoping that it will prove profitable to others too.
Indeed, the law, as it is considered as a rule, can no more be abolished or changed than the nature of good and evil can be abolished and changed. The substance of the law is the sum of doctrine concerning piety towards God, charity towards our neighbours, temperance and sobriety towards ourselves. And for the substance of it, it is moral and eternal, and cannot be abrogated. We grant that the circumstances under which the moral law was originally given were temporary and changeable, and we have now nothing to do with the promulgator, Moses, nor with the place where it was given, Mount Sinai, nor with the time when it was given, fifty days after the people came out of Egypt, nor yet as it was written in tables of stone, delivered with thunderings and lightnings. We look not to Sinai, the hill of bondage, but to Zion, the mountain of grace. We take the law as the image of the will of God which we desire to obey, but from which we do not expect life and favour, neither do we fear death and rigour. This, I conceive, is the concurrent opinion of all divines. For believers, the law is abrogated in respect of its power to justify or condemn; but it remains full of force to direct us in our lives. It condemns sin in the faithful, though it cannot condemn the faithful for sin. Says Zanchius: 'The observance of the law is necessary for a Christian man, and it is not possible to separate such observance from faith.' And as Calvin says: 'Let us put far from us the ungodly notion that the law is not to be our rule, for it is our changeless rule of life.' The moral law, by its teaching, admonishing, chiding, and reproving, prepares us for every good work. The law is void in respect of its power to condemn us, but it still has power to direct us; we are not under its curse, but yet under its commands.You can read the rest, and I recommend that you do that, here.
May the Lord bless His day to you, and you in His day.