The ninth principle Faithful transmission and that is that this Torah has faithfully been transmitted from the Creator, God - may He be blessed - and not from anyone else. And [so] it cannot be added to and it cannot be taken away from, as it is stated (Deuteronomy 13:1), "you shall not add to it and you shall not take away from it." And we have already elucidated this principle in the introduction to this composition.

It is clear and explicit in the Torah that it is [God's] commandment, remaining forever without change, addition, or diminishment, as [Deuteronomy 13:1] states: "All these matters which I command to you, you shall be careful to perform. You may not add to it or diminish from it," and [Deuteronomy 29:28] states: "What is revealed is for us and our children forever, to carry out all the words of this Torah." This teaches that we are commanded to fulfill all the Torah's directives forever.
It is also said: "It is an everlasting statute for all your generations," and [Deuteronomy 30:12] states: "It is not in the heavens." This teaches that a prophet can no longer add a new precept [to the Torah].
Therefore, if a person will arise, whether Jew or gentile, and perform a sign or wonder and say that God sent him to:
a) add a mitzvah,
b) withdraw a mitzvah
c) explain a mitzvah in a manner which differs from the tradition received from Moses, or
d) if he says that the mitzvot commanded to the Jews are not forever, but rather were given for a limited time,
he is a false prophet. He comes to deny the prophecy of Moses and should be executed by strangulation, because he dared to make statements in God's name which God never made.
God, blessed be His name, commanded Moses that this commandment is for us and our children forever, and, God is not man that He speak falsely.

One should not presume that the Messianic king must work miracles and wonders, bring about new phenomena in the world, resurrect the dead, or perform other similar deeds. This is definitely not true.
Proof can be brought from the fact that Rabbi Akiva, one of the greater Sages of the Mishnah, was one of the supporters of King Bar Kozibah and would describe him as the Messianic king. He and all the Sages of his generation considered him to be the Messianic king until he was killed because of sins. Once he was killed, they realized that he was not the Mashiach. The Sages did not ask him for any signs or wonders.
The main thrust of the matter is: This Torah, its statutes and its laws, are everlasting. We may not add to them or detract from them.

Any person who does not carry out their directives transgresses a negative commandment, as Ibid. continues: "Do not deviate from any of the statements they relate to you, neither right nor left."
Lashes are not given for the violation of this prohibition, because it also serves as a warning for a transgression punishable by execution by the court. For when a sage rebels against the words of the court, he should be executed by strangulation, as the following verse states: "A person who will act deliberately...."
We are obligated to heed their words whether they:
a) learned them from the Oral Tradition, i.e., the Oral Law,
b) derived them on the basis of their own knowledge through one of the attributes of Biblical exegesis and it appeared to them that this is the correct interpretation of the matter,
c) instituted the matter as a safeguard for the Torah, as was necessary at a specific time. These are the decrees, edicts, and customs instituted by the Sages.
It is a positive commandment to heed the court with regard to each of these three matters. A person who transgresses any of these types of directives transgresses a negative commandment. This is derived from the continuation of the above verse in the following manner: "According to the laws which they shall instruct you" - this refers to the edicts, decrees, and customs which they instruct people at large to observe to strengthen the faith and perfect the world. "According to the judgment which they relate" - this refers to the matters which they derive through logical analysis employing one of the methods of Biblical exegesis. "From all things that they will tell you" - This refers to the tradition which they received one person from another.

When the Supreme Sanhedrin was in session, there was never any prolonged differences of opinion among the Jewish people. Instead, if a doubt arose in a Jew's mind over any law, he would inquire of the court in his city. If not, the questioner and that court - or its agents - ascend to Jerusalem and ask the court which holds sessions on the Temple Mount. If they know, they will reply to him, if they do not know, everyone comes to the court that holds sessions at the entrance to the Temple Courtyard. If they know, they will reply to him, if they do not know, everyone comes to the Chamber of Hewn Stone, to the Supreme Sanhedrin, and presents the question. If the matter that was unresolved by all the others was known to the Supreme Sanhedrin - either as part of the Oral Tradition or because of its derivation through the principles of exegesis - they relate the decision immediately. If, however, the decision was unclear to the Supreme Sanhedrin, they deliberate about the matter at that time and debate it back and forth until they reach a uniform decision, or until a vote is taken. In such a situation, they follow the majority and then tell all the questioners: "This is the halachah." The questioners then all depart.
After the Supreme Sanhedrin was nullified, differences of opinion multiplied among the Jewish people. One would rule an article is impure and support his ruling with a rationale and another would rule that it is pure and support his ruling with a rationale. This one would rule an article is forbidden and this would rule that it is permitted.

When, using one of the principles of exegesis, the Supreme Sanhedrin derived a law through their perception of the matter and adjudicated a case accordingly, and afterwards, another court arose and they perceived another rationale on which basis, they would revoke the previous ruling, they may revoke it and rule according to their perception. This is reflected by Deuteronomy 17:9: "To the judge who will be in that age." This indicates that a person is obligated to follow only the court in his own generation.

A court may, however, suspend the application of such decrees temporarily, even if it is of lesser stature than the original court. The rationale is that these decrees should not be considered as more severe than the words of the Torah itself, and any court has the authority to abrogate the words of the Torah as a temporary measure.
What is implied? If a court sees that it is necessary to strengthen the faith and create a safeguard so that the people will not violate Torah law, they may apply beatings and punishments that are not sanctioned by Torah. They may not, however, establish the matter for posterity and say that this is the halachah.
Similarly, if they saw that temporarily it was necessary to nullify a positive commandment or violate a negative commandment in order to bring people at large back to the Jewish faith or to prevent many Jews from transgressing in other matters, they may do what is necessary at that time. To explain by analogy: Just like a doctor may amputate a person's hand or foot so that the person as a whole will live; so, too, at times, the court may rule to temporarily violate some of the commandments so that they will later keep all of them. In this vein, the Sages of the previous generations said: "Desecrate one Sabbath for a person's sake so that he will keep many Sabbaths."

Similarly, if [a "prophet"] nullifies a concept which was transmitted by the oral tradition, or states with regard to one of the Torah's laws that God commanded him to render such and such a judgment, or that such and such is the law regarding a particular instance and the decision follows a certain opinion, he is a false prophet and should be [executed by] strangulation. [This applies] even if he performs a wonder, for he is coming to deny the Torah, which states: "It is not in the heavens."
If, however, [he states that] for a limited time [we should follow a particular course of behavior], he should be listened to with regard to all things.

When does the above apply? With regard to all other mitzvot. Regarding the worship of false gods, however, he should not be heeded, even for a limited time. Even if he performs great wonders and miracles and says that God commanded him to worship false gods only on this day or only during this hour, he is considered to have "spoken perversely against God."
Concerning this, the Torah has commanded [us, Deuteronomy 13:3-6]: "If a sign or miracle is performed... [and he tells you, `Let us serve other gods...'] Do not listen to the words of this prophet... for he has spoken perversely against God, your Lord." He is coming to deny the prophecy of Moses. Therefore, we may definitely conclude that he is a false prophet, and everything that he did was performed through sorcery and magic. [Hence,] he should be [executed by] strangulation.