My study of covenants leads me to think that a covenant is a relationship that God establishes with man and once it is established it is always so. God adds additions but God never cancels as way He relates to us. I think that if we lived at the time of the 613 laws, and our life and understanding was of that culture that the laws would reflect God for us. As an example, not mixing fibers doesn't work for us today, but the principle of not changing what God has created and how God created it to be has not changed. Don't use DDT, natural foods are best, etc.
2 Corinthians 3:7-11 (NASB) But if the ministry of death, in letters engraved on stones, came with glory, so that the sons of Israel could not look intently at the face of Moses because of the glory of his face, fading
as it was, how will the ministry of the Spirit fail to be even more with glory? For if the ministry of condemnation has glory, much more does the ministry of righteousness abound in glory. For indeed what had glory (
Mosaic Covenant), in this case has no glory because of the glory
(New Covenant) that surpasses
it. For if that which fades away
was with glory, much more that which remains
is in glory.
Hebrews 8:7-13 (NASB) For if that first
covenant (Mosaic Covenant) had been faultless, there would have been no occasion sought for a second. For finding fault with them, He says, "BEHOLD, DAYS ARE COMING, SAYS THE LORD, WHEN I WILL EFFECT A NEW COVENANT WITH THE HOUSE OF ISRAEL AND WITH THE HOUSE OF JUDAH; NOT LIKE THE COVENANT WHICH I MADE WITH THEIR FATHERS ON THE DAY WHEN I TOOK THEM BY THE HAND TO LEAD THEM OUT OF THE LAND OF EGYPT; FOR THEY DID NOT CONTINUE IN MY COVENANT, AND I DID NOT CARE FOR THEM, SAYS THE LORD. "FOR THIS IS THE COVENANT THAT I WILL MAKE WITH THE HOUSE OF ISRAEL AFTER THOSE DAYS, SAYS THE LORD: I WILL PUT MY LAWS INTO THEIR MINDS, AND I WILL WRITE THEM ON THEIR HEARTS. AND I WILL BE THEIR GOD, AND THEY SHALL BE MY PEOPLE. "AND THEY SHALL NOT TEACH EVERYONE HIS FELLOW CITIZEN, AND EVERYONE HIS BROTHER, SAYING, 'KNOW THE LORD,' FOR ALL WILL KNOW ME, FROM THE LEAST TO THE GREATEST OF THEM. "FOR I WILL BE MERCIFUL TO THEIR INIQUITIES, AND I WILL REMEMBER THEIR SINS NO MORE." When He said, "A new
covenant," He has made the first obsolete. But whatever is becoming obsolete and growing old is ready to disappear.