"אָנֹכִי י״י אֱלֹהֶיךָ" – Command or proclamation?
According to Ramban and Rambam despite not being formulated in the imperative, the statement, "I am Hashem..." nonetheless constitutes a command to believe in God. Ramban explains that Hashem is not simply introducing Himself, but pointing to His role in the Exodus as proof of His existence, His role as Creator,1 and hence His unity.2 This establishes the requirement that all know and believe in God.
Shadal, in contrast, suggests that the verse is simply an introduction and not a command, but that it might nonetheless cnstitute the first of the ten utterances, as ther eneed not be direct corellation between the number of utterances and teh number of mitzvot included,
Relationship between "אָנֹכִי" and "לֹא יִהְיֶה" – These two statements are flip sides of one another, one formulated in the positive and the other in the negative. Hashem first mandates belief in Him alone, then stipulates that one may not serve any gods besides him..
"לֹא יִהְיֶה" vs. "לֹא תַעֲשֶׂה" vs. "לֹא תִשְׁתַּחֲוֶה" etc.
According to Ramban, the entire second statement constitutes one command, the prohibition of idolatry. All the various components relate to
Rambam, in contrast, counts each action as its own individual prohibition, against believing in other gods, fashioning an idol, bowing down to one,3 or worshiping one in other ways.4
Correspondence between Dibrot and Mitzvot
Split "לא יהיה"
The statement "I am Hashem your God..." does not constitute an independent utterance. The number ten is reached, instead, by dividing "לֹא יִהְיֶה... מִצְוֺתָי" into two. This position disagrees regarding where to make the split:
"אנכי... על פני" and "לא תעשה"
The first utterance consists of both the statement "I am Hashem your God.." and "You shall have no other gods before me". The second utterance begins with "Do not make for yourselves an idol".
Relationship between "אָנֹכִי" and "לֹא יִהְיֶה" – R. Shimon b. Tzemach Duran asserts that the two statements are combined because they revolve around the same issue and are, in essence, simply flipsides of each other. "אָנֹכִי" mandates belief in Hashem and "לֹא יִהְיֶה" prohibits belief in any foreign gods. Taken together, they mandate that one believe in Hashem exclusively.
"אָנֹכִי י״י אֱלֹהֶיךָ" – Command or proclamation?
Command – Despite the fact that the statement is not phrased in the imperative, these sources all read it as constituting the command to accept Hashem as God. By combining "אָנֹכִי" with the explicit command "לֹא יִהְיֶה", the two are equated, suggesting that both are imperative in nature.
Proclamation – This position could have alternatively suggested that the statement is indeed a prologue, but one which is limited to the command of "do not have any Gods before me". Before prohibiting belief in false Gods, Hashem explains why: because I am the only true God.
Can belief be commanded
"לֹא יִהְיֶה לְךָ " vs. "לֹא תַעֲשֶׂה לְךָ" – According to this approach, there is a fundamental divide between the prohibitions of these two statements, justifying their constituting two utterances.
Different manner of worship – R. Shimon b. Tzemach Duran asserts that "לֹא יִהְיֶה" is a commandment of the heart or mind, while "לֹא תַעֲשֶׂה" is action-oriented. The former prohibits belief in idolatry, while the latter prohibits the making of idols.
Different object of worship – Alternatively, as R. Shemuel b. Chofni Gaon suggests, the first utterance speaks of belief in false gods, while the second prohibits making images even of Hashem Himself.
Correspondence between Dibrot and Mitzvot – R. Shimon b. Tzemach Duran asserts that there is no direct correspondence between the number of mitzvot and the number of utterances. Thus, in one utterance there could be both a positive command to believe in God and a negative command not to believe in other gods. This is similar to the utterance regarding Shabbat, which also includes both a positive and negative command, despite it being but one utterance.
Depiction on tablets – Philo and Josephus assert that there were five utterances written on each tablet. The first tablet focuses on Hashem, our father and Creator, and ends with commands regarding one's parents who "imitate his nature". The other five focus on interpersonal relations.
"לא יהיה" and "לא תעשה"
The first utterance consists of only "You shall have no other gods before me", while the second statement begins "Do not make for yourselves an idol". 7
"אָנֹכִי י״י אֱלֹהֶיךָ" – Command or proclamation? Since the verse is not worded in command form and contains no demands of the nation, this approach reads the utterance as being a prologue to the entire Decalogue.8 Before Hashem commands the people, He introduces Himself, explaining why they should observe His commandments.9 As such, the utterance is not included in the count of ten at all.
Can one command belief? The Baal Halakhot Gedolot does not count belief in God as one of the 613 commandments. It is not clear, however, if this is because he thinks it is the foundation on which all else stands and thus comes prior to decrees, or if he assumes that faith is not subject to one's control and so it is impossible to demand it of someone.
"לֹא יִהְיֶה לְךָ " vs. "לֹא תַעֲשֶׂה לְךָ" – As above, this approach views these two utterances as mandating two distinct prohibitions. The distinction relates either to the manner of worship (with the first speaking of belief and the second of the physical making of idols) or to the object of worship (with the first referring to idolatry and the second to making a physical representation of even Hashem).
Cantillation marks
"לא יהיה" and "לא תשתחוה"
The first utterance includes both "You shall have no other gods" and “You shall not make for yourselves an idol", while the second utterance commands both "You shall not bow down" and "You shall not serve them".
"אָנֹכִי י״י אֱלֹהֶיךָ" – Command or proclamation? The announcement "I am the Lord your God" is not considered a commandment but rather an introduction to all the mitzvot for it is the foundation on which all else builds. It is, thus, not formulated in the imperative and contains no explicit directive to act, think, or feel in any way. Hashem simply introduces Himself.
Can you command belief – Ramban assumes that the Baal Halakhot Gedolot does not count belief as a commandment, not because one cannot command belief, but because it is the foundation upon which all else rests and thus cannot be itself decreed.
"לֹא יִהְיֶה לְךָ " and "לֹא תַעֲשֶׂה לְךָ" - What is included? According to this position these phrases prohibit the making and possessing of idols rather than their worship. "לֹא יִהְיֶה לְךָ" forbids keeping idols, even if made by others and "לֹא תַעֲשֶׂה לְךָ" prohibits the creation itself.
"לֹא תִשְׁתַּחֲוֶה לָהֶם וְלֹא תָעׇבְדֵם" - What is included? As opposed to the first utterance which prohibits possession of idols, this utterance prohibits their worship.
The order – Ramban questions this understanding based on the order of the utterances. Since active worship of idols in a much more severe sin that simply making or having them in one's possession (one is punished with death and the other only with lashes), it would have been expected that the prohibitions "לֹא תִשְׁתַּחֲוֶה לָהֶם וְלֹא תָעׇבְדֵם" precede that of "לֹא יִהְיֶה לְךָ".
Split "לא תחמוד"
The statement "I am Hashem your God" does not constitute an independent utterance. The number ten is reached instead by splitting "Do not covet" into two.