how the law is fulfilled... explained to the Hebrews by Paul
https://www.lds.org/scriptures/nt/gal/3.24-25?lang=eng&clang=eng#p23
Gal 3:24 Wherefore the law was our schoolmaster to bring us unto Christ, that we might be justified by faith.
25 But after that faith is come, we are no longer under a schoolmaster.
The Sabbath was not removed, simply the reason and the day of its commemoration was shifted to the first day of the week. Commemorating the new covenant or atonement of Jesus Christ is now the focus of the day.
Romans 3:30 Seeing it is one God, which shall justify the circumcision by faith, and uncircumcision through faith.
31 Do we then make void the law through faith? God forbid: yea, we establish the law.
Evweything in Galatians is correct but the understanding is this: the law cannot save us under the law we continued to fail therefore we needed to continully sacrafice animals for the punishment of sin ( which is breaking Gods law). Jesus became our perfect sacrafice, being he kept all of the laws perfectly, satifying the the sacrafice law once and for all. So through His blood we are forgiven. But that doesn't do away with the law in fact we uphold the law. As one receiving this free gift of forgiveness we ought to seek to follow Christ and walk as He walked which was perfect in Our Fathera laws. Had He not walked perfectly in Gods law He would have not been an acceptable sacrafice. What Jesus did was wash away our sins and bring us back in a relationship with the Almighty through Him.
Romans 7: 7 What shall we say then? Is the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.
1 John3:4 Whosoever committeth sin transgresseth also the law: for sin is the transgression of the law.
"Till heaven and earth pass" is the criteria that Christ gave us to know when all will be fullfilled.