Jesus spoke and did the will of the Father.
John 3:34 God sent Jesus. Jesus speaks the words of God, because God gave him the Spirit without limit.
Jesus' words and life was a manifestation of God's Law.
The Law will be written on the heart in the new covenant. Which Law is God referring to? Well if you read the New Testament you will find referrence to the Ten Commadments all throughout the NT.
Matthew 19:17-19 So He said to him, "Why do you call Me good? No one is good but One, that is, God. But if you want to enter into life, keep the commandments.'' He said to Him, "Which ones?'' Jesus said, " `You shall not murder,' `You shall not commit adultery,' `You shall not steal,' `You shall not bear false witness,' `Honor your father and your mother,' and, `You shall love your neighbor as yourself.' ''
Ephesians 6:1-3 Children, obey your parents in the Lord, for this is right. "Honor your father and mother,'' which is the first commandment with promise: "that it may be well with you and you may live long on the earth.''
Romans 13:8-10 Owe no one anything except to love one another, for he who loves another has fulfilled the law. For the commandments, "You shall not commit adultery,'' "You shall not murder,'' "You shall not steal,'' "You shall not bear false witness,'' "You shall not covet,'' and if there is any other commandment, are all summed up in this saying, namely, "You shall love your neighbor as yourself.'' Love does no harm to a neighbor; therefore love is the fulfillment of the law.
Which Sabbath do you think is being referred to in all these verses?
Matthew 12:11-12 Then He said to them, "What man is there among you who has one sheep, and if it falls into a pit on the Sabbath, will not lay hold of it and lift it out? "Of how much more value then is a man than a sheep? Therefore it is lawful to do good on the Sabbath.''
Matthew 12:8 "For the Son of Man is Lord even of the Sabbath.''
Matthew 24:20 "And pray that your flight may not be in winter or on the Sabbath.
Did Jesus or His disciples do away with the Sabbath or change the Sabbath?
The defination of godly love is spelled out in the Ten Commandments.
Romans 13:8-10 Owe no one anything except to love one another, for he who loves another has fulfilled the law. For the commandments, "You shall not commit adultery,'' "You shall not murder,'' "You shall not steal,'' "You shall not bear false witness,'' "You shall not covet,'' and if there is any other commandment, are all summed up in this saying, namely, "You shall love your neighbor as yourself.'' Love does no harm to a neighbor; therefore love is the fulfillment of the law.
If we express godly love it will manifest as not worshiping other gods, not using the Lord's name in vain, remembering to keep the Sabbath holy, not stealing, not lying and so on.
Remember, love can manifest in many different ways such as seen in adultery and homosexuality. Love can even manifest itself as stealing and murder if you have a love of money.
Can one love without having the Law? Yes they can, God will hold them accountable to what they understand outside of having the Law. But when a person is born again and starts seeking God through His word God will begin to define godly love. Godly love involves not only loving other, but also, loving God. This is something a lost person does not have knowledge of.
Since the life and words of Jesus are the standard and He never broke God's Law than we have to include God's Law as part of the New Covenant otherwise all the verses that refer to God's Law have no value or meaning..