I've not seen one person in this entire thread claiming to be justified by the law. I've only seen people read into something others say.
The law isn't the currency we buy our salvation with. Its the receipt that is proof of our salvation. Jesus on the cross is what buys our salvation, but the proof of that His spirit lives on in is, is that we desire to be free of sin (which is the transgression of the law) causing us to abandon our old ways and obey Him and His holy law.
Ezekiel 36:26-27 -
26 A new heart also will I give you, and a new spirit will I put within you: and I will take away the stony heart out of your flesh, and I will give you an heart of flesh.
27 And I will put my spirit within you, and cause you to walk in my statutes, and ye shall keep my judgments, and do
them
It's not hard. There's not "613" like people say. We can't do most of them. Many were given to certain people. Some to women, some to Levites, some to the Levitical sons of Aaron, some to farmers, to slave owners, to children, etc. If you're not any of those things, they don't apply. We have no temple - so we can't sacrifice. That and Jesus is our priest, and only the priest is to offer sacrifices. We have no judges council, so no stoning.
Right now there's really only 150-200 that apply to any one person if you go through and read the context they were given in. Even God himself says that keeping the law isn't too hard for us.
Dueteronomy 30:11-14 -
11For this commandment which I command thee this day, it
is not hidden from thee, neither
is it far off.
12It
is not in heaven, that thou shouldest say, Who shall go up for us to heaven, and bring it unto us, that we may hear it, and do it?
13Neither
is it beyond the sea, that thou shouldest say, Who shall go over the sea for us, and bring it unto us, that we may hear it, and do it?
14But the word
is very nigh unto thee, in thy mouth, and in thy heart, that thou mayest do it.
Being justified by the law is impossible, but with faith the places we fail and are lacking are made up for. That's what Paul is talking about in Romans 7-8. In 7 he desires to keep the law, but his flesh causes him to stumble, and at the end of 7 he says though he stumbles Jesuss atones for his failure. Chapter 8 talks about how the law of God is what we desire to follow in our heart and mind and try our best to keep as best we can, but our fleshly body causes us to disobey. But those of the flesh desire to and do disobey it even in their heart and mind.