I understand that you were referring to the Law. The Levitical Law was used to teach obedience to the Covenant of Moses. A the time of Christ, it had become so corrupt that no one could keep it. That's why we have the New Covenant that is based on the two New Commandments. When you start corrupting them, the same thing happens. If Levitical Law had been corrupted so easily, why would God use it again?
First off, it's not the covenant of Moses.
Second, the 2 commandments of love are not new, they are the law God gave to Moses and not Moses' ideas.
Third, the Levitical law was the physical foreshadowing of what Jesus fulfilled and now is understood spiritually because Jesus was/is the final sacrifice. We are to continue in presenting our bodies as a living sacrifice unto God which is reasonable.
I'll quote some of the spiritual instructions of love from the law so we can learn how to love God's way and not our own way.
Deuteronomy 6:1-6
1 Now these are the commandments, the statutes, and the judgments, which the LORD your God commanded to teach you, that ye might do them in the land whither ye go to possess it:
2 That thou mightest fear the LORD thy God, to keep all his statutes and his commandments, which I command thee, thou, and thy son, and thy son's son,
all the days of thy life; and that thy days may be prolonged.
3 Hear therefore, O Israel, and observe to do it; that it may be well with thee, and that ye may increase mightily, as the LORD God of thy fathers hath promised thee, in the land that floweth with milk and honey.
4 Hear, O Israel: The LORD our God is one LORD:
5
And thou shalt love the LORD thy God with all thine heart, and with all thy soul, and with all thy might.
6 And these words, which I command thee this day, shall be in thine heart:
Leviticus 19:11-18
11 Ye shall not steal, neither deal falsely, neither lie one to another.
12 And ye shall not swear by my name falsely, neither shalt thou profane the name of thy God: I am the LORD.
13 Thou shalt not defraud thy neighbour, neither rob him: the wages of him that is hired shall not abide with thee all night until the morning.
14 Thou shalt not curse the deaf, nor put a stumblingblock before the blind, but shalt fear thy God: I am the LORD.
15 Ye shall do no unrighteousness in judgment: thou shalt not respect the person of the poor, nor honour the person of the mighty: but in righteousness shalt thou judge thy neighbour.
16 Thou shalt not go up and down as a talebearer among thy people: neither shalt thou stand against the blood of thy neighbour: I am the LORD. 17 Thou shalt not hate thy brother in thine heart: thou shalt in any wise rebuke thy neighbour, and not suffer sin upon him.
18 Thou shalt not avenge , nor bear any grudge against the children of thy people,
but thou shalt love thy neighbour as thyself: I am the LORD.
There is nothing new about these laws even though we live in a much different culture.