Shared ground
These verses introduce a new message that Ezekiel presents as coming from Yahweh, not as Ezekiel’s own political analysis (explicit: “the word of Yahweh came to me”). The prophet is addressed as “son of man,” emphasizing his human role as a messenger under orders (explicit). He is told to focus deliberately on “the children of Ammon” and to speak a prophetic message “against” them (explicit).
In the wider flow of the book, this opening marks a shift from speeches centered on Jerusalem to speeches directed at surrounding peoples. It signals that Yahweh’s concern and authority are not limited to Judah’s internal life but extend outward to neighboring nations (inference from the literary move described in the context).
Where interpretation differs
What “set your face” means. Some take it as a physical orientation (face the direction of Ammon as a public sign). Others take it mainly as a fixed stance of opposition (a way of saying “take a firm position against them”), whether or not Ezekiel literally turns to the east.
How broad “children of Ammon” is. Many read it as the whole Ammonite people. Others ask whether the immediate target is a particular leadership group, military force, or a current generation, even if the phrase can still stand for the nation as a whole.
What “prophesy against” signals. Most understand it to introduce a judgment announcement. A few frame it more broadly as an adversarial prophetic speech (critique and warning), with the precise outcome left for the following verses to specify.
Why the disagreement exists
The phrases in v. 2 are stock prophetic language that can function both as bodily symbolism and as metaphorical resolve, so readers differ on how literal to make the imagery. Also, these two verses are only the commissioning line; they point forward to content that is not yet stated here, so interpreters infer the tone and scope from common prophetic patterns rather than from details in these lines alone.
What this passage clearly contributes
It establishes the source-claim (“Yahweh spoke”), the messenger (“son of man”), and the target and direction of the next oracle (Ammon; speech “against” them). It also serves as the formal start of the nations-oracle section in Ezekiel, indicating that the book will interpret events in the region as answerable to Yahweh, not only events inside Judah (inference grounded in the passage’s placement and function).