The law is GODs standard and in the old testament it is GODs law and we know that
GOD does not change,but when the law was given the WORD of GOD/JESUS had not yet come into the world
in the flesh yet,so then wouldn't a person have to keep the law without help and no man was able to keep it except JESUS.
A person saying since GOD gave it in the old testament we then should
try to keep it even though we know we keep coming up short and GOD will only accept perfection(the inward man).
If you are still
trying to keep it then you are still on milk and haven't learned and are still crawling.
If that's where you are then I understand but when its time to walk don't you think you should come up higher, eat meat and stop crawling.
1 Corinthians 13:11king james version(kjv)
11.)When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things.
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And if you don't accept that then here is another scripture
2 Timothy3:7
king james version(kjv)
7.)Ever learning, and never able to come to the knowledge of the truth.