In the book of Mathew it says, Mat 22:37-40 Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. This is the first and great commandment. And the second is like unto it, Thou shalt love thy neighbour as thyself. On these two commandments hang all the law and the prophets.
When Jesus quoted these two commandments He was not giving a new law to replace the Ten Commandments of God, He was in fact quoting an Old Testament scripture on the importance of keeping the Ten Commandments. Deu 6:5-8 And thou shalt love the LORD thy God with all thine heart, and with all thy soul, and with all thy might. And these words, which I command thee this day, shall be in thine heart: And thou shalt bind them for a sign upon thine hand, and they shall be as frontlets between thine eyes.
Jesus was reinforcing the sentiment that the Ten Commandments were a law of love. The first four commandments showed us how to love God, and the last six how to love our fellow man. This is why He said, On these two commandments hang all the law and the prophets.
Another verse showing the nature of the Ten Commandments is John 15:10 If ye keep my commandments, ye shall abide in my love; even as I have kept my Father’s commandments, and abide in his love.
Paul wrote Rom 13:8 Owe no man any thing, but to love one another: for he that loveth another hath fulfilled the law.
James showed that we should view the law as a law of liberty, like a mirror that shows us our sinful nature. Jam 2:11-12 For he that said, Do not commit adultery, said also, Do not kill. Now if thou commit no adultery, yet if thou kill, thou art become a transgressor of the law. So speak ye, and so do, as they that shall be judged by the law of liberty. He goes on and shows more importantly that we need to seek to follow the law to the best of our ability. He demonstrated that even though we are saved through Grace, it does not mean that we can be disobedient to the law of God. He says we cannot be saved by faith alone because the result of true faith will be seen in our actions (works), by the life we are leading. Jam 2:13 For he shall have judgment without mercy, that hath shewed no mercy; and mercy rejoiceth against judgment. What doth it profit, my brethren, though a man say he hath faith, and have not works? can faith save him? If a brother or sister be naked, and destitute of daily food, And one of you say unto them, Depart in peace, be ye warmed and filled; notwithstanding ye give them not those things which are needful to the body; what doth it profit? Even so faith, if it hath not works, is dead, being alone. This shows that in New Testament times it is still important to keep the ten rules of love that God laid down for the benefit of mankind.
Gods Ten Commandments truly are His ten magnificent rules of love. They show how to love Him and people, but the fourth commandment, the Sabbath, is perhaps the real test of Love. The other nine say what not to do, but the Sabbath tells us what we should do to demonstrate our love and obedience to God. He has told us to devote every seventh day to Him. He instituted this at the beginning of the world, as both a memorial to His creation and a time for man to commune with Him.
Jesus and His disciples all faithfully kept the Sabbath day their entire lives, and Jesus made it clear that there would be no changes to the law, or the day to keep the Sabbath on when He said, Mat 5:18 For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.
All Bible references are from the King James Version.