לא תוסף עליו, for you might add something which is despicable in the eyes of the Lord. If, perchance, you would add new ways of the serving the Lord, you have no assurance that such innovation is acceptable to G’d, for instance the burning of one’s children in G’d’s honour.

ולא תגרע ממנו, even if, in your judgment, the rationale for observing the commandment in question no longer applies, is no longer relevant. An example would be Solomon’s reasoning that the restrictions placed by the Torah on the number of wives a king may have did not apply to him as none of these wives could possibly incite him to turn away from G’d. (compare Sanhedrin 21).

אשר לא ידעתם, the miracle proving the existence of such a phenomenon seeing you had never heard of its existence. Seeing we do not know the function of the phenomenon makes it more difficult to dismiss the idea that it possesses powers. It is unlike sun and moon whose functions and limitations we know. We know that it is useless to pray to sun and moon, as their obvious limitations are known to us.

לא תשמע אל הנביא ההוא, do not even turn to listen to find out if his words have even partial substance, for there can be no question that the man is full of lies and tells you things he has made up, all for an evil purpose; כי דבר סרה, for what he portrays as a miracle is nothing but sleight of hand or forgery of some other kind.

או אל חולם החלום ההוא, to see if even part of what he dreamt reflected some truth of what was going to happen; you may be sure that the dreamers did not actually dream any part of what he claimed to have dreamt, but he invented all of it in order to seduce you;

כי מנסה ה' אלוקיכם אתכם, by referring with hostility to a person who spoke out against G’d, you will be proven as truly loving G’d.

לדעת, once your previously theoretical faith in G’d has been so tested, you will become truly tested in your intimate conviction of G’d’s goodness which becomes an unshakable enduring conviction. Someone who believes truly in the goodness of the Lord cannot help but hate anyone who denies G’d’s goodness, just as if you love a human being truly you cannot help hating a person who hates the person whom you truly love.

אחרי ה' אלוקיכם תלכו, similarly phrased to והלכת בדרכיו in Deut. 28,9. You are not to seek out new paths which the “prophet” or “dreamer” employs to make you depart from the ways of the Lord.

ואותו תיראו, even though the person who now claims to be a prophet had previously been considered as a pious and thoroughly G’d-fearing individual. Your prior esteem of him and his views must turn into total rejection and you must allow your awe and reverence for G’d and His words to outweigh any argument he may present. ואת מצותיו תשמורו, so that you will only observe His commandments and not any new ones claimed to be His by the new “prophet.” This refers in particular to matters involving idolatry where the most minute deviation automatically challenges the totality of Torah and all of its laws.

ובקולו תשמעון, you are to carry out all the instructions given to you by properly accredited prophets and to listen to their commands, such as to Elijah at Mount Carmel, and not to the instructions of anyone canceling any of G’d’s commandments.

ואותו תעבודו, exclusively. You cannot simultaneously serve any other deity as spelled out in Exodus 22,19 זובח לאלוהים יחרם, “if anyone is found offering sacrifices to any other deity he is guilty of death.”

ובו תדבקון, the objective of all your activities must be to carry out His will unaffected by any prior hostility.

'יומת, כי דבר סרה על ה, even though he had claimed to speak in the name of the Lord and not in the name of some other deity, something which had convinced him that his crime was not subject to the death penalty. We encounter such a scenario in Jeremiah 26,16 where the elders of Jerusalem do not want to convict Jeremiah to the death penalty because he had spoken in the name of the Almighty G’d, i.e. had not denied His sovereignty, although he was perceived as a false prophet, no one accepting his predictions of doom and his call to repentance.

להדיחך מן הדרך, even though he had never asked you to abandon G’d, and had only presented an “updated” version of this same G’d’s commandments. He had, however, asked you to depart from “timeless Torah,” making G’d’s laws something that could be changed from time to time, thus making Moses the father figure of all prophets irrelevant. [my words. Ed.]

הקרובים אליך, even though these nations live in your vicinity and you are aware of the lies which their religion is based upon, and because you are, there would be no reason to worry about the influence of such a religion upon you.

או הרחוקים ממך מקצה הארץ, so that on account of the very distance there is no real concern that you would learn from their ways.

לא תאבה לו, when he suggests that you investigate the truth of his words that a certain form of idolatry is demonstrably effective for its believers, do not assent to listen to him.

ולא תשמע אליו, you must not listen to him to make such an experiment, and to go through a “conditional” obeisance as a test. The reason is that the moment you even entertain doubts about the utter falsity of what the seducer claims, in the end you will become a victim of his persuasiveness. You could not even entertain any doubt about G’d and His Torah unless you had never properly understood the greatness of G’d and His mastery in the universe.

כי בקש להדיחך, even though he did not cause tangible damage, and therefore might have thought himself immune from prosecution, as opposed to the person who incited to idolatry in the Ir Hanidachat, a city whose majority became idolaters. He is guilty of the death penalty כי בקש להדיחך, because of his attempt to convert people to idolatry. His execution will prevent him from seducing still others. Failure to execute him might result in his success.

וכל ישראל ישמעו וייראו ולא יוסיפו, neither the seducer himself nor others who found him convincing.

ואת בהמתה לפי חרב, to wipe out their memory as a form of vengeance on behalf of the G’d of Israel. The principle underlying the destruction of the belongings of these people is the same as that contained in G’d’s commandment to destroy every vestige of Amalek in order to obliterate any memory of that nation. (compare. Deut. 25,19) The prophet Samuel spelled this out prior to ordering King Sha-ul to carry out this commandment in Samuel I 15,3.

ולא ידבק מאומה מן החרם, in order to ensure that such loot not become a stumbling block for you, as when loot of idolaters is retained, something the Torah has forbidden not only in practice, but even the desire to own such loot has been forbidden (Deut. 7,25). We have discussed this matter on that verse.