Shared ground
Deuteronomy 18:15–19 presents Yahweh’s answer to Israel’s fear at Horeb: instead of hearing Yahweh’s voice directly, Israel will receive Yahweh’s words through a prophet raised up “from among” them. The passage treats this mediated arrangement as approved by Yahweh (“they have well said”).
The text’s explicit claim is that the prophet will speak Yahweh’s own words (“I will put my words in his mouth”), and that Israel is accountable for refusing what Yahweh says through that prophet (“I will require it of him”). A key theme is legitimate guidance: Yahweh supplies an internal, authorized spokesperson rather than leaving Israel to seek direction from forbidden sources.
Where interpretation differs
One question is whether “a prophet like Moses” points mainly to an ongoing line of prophets in Israel, or to a single future figure who uniquely matches Moses.
Another question is what “like Moses” includes. Some read it as general similarity (a true prophet who delivers Yahweh’s words). Others think it implies a higher, Moses-level role (foundational mediator, covenant leadership, or unmatched authority).
A related question is how narrowly “from among your brothers” should be taken. Many read it as “from within Israel.” Some extend “brothers” more broadly (for example, to closely related peoples), which affects who could qualify.
Why the disagreement exists
The passage uses singular language (“a prophet”) but in a way that can naturally describe either (1) each legitimate prophet Yahweh will raise up over time, or (2) a climactic representative prophet. Also, “like Moses” is not defined here, so interpreters weigh different parts of Moses’ role (mediator at Horeb, law-giver, leader, miracle-worker) as more central.
What this passage clearly contributes
It establishes Yahweh’s model for post-Horeb guidance: Yahweh will raise up a prophet from within the people, Yahweh will supply the message, and the people are required to listen. The authority of the prophet is not presented as personal creativity but as faithful speech in Yahweh’s name.
It also frames rejection of the prophetic word as rejection of Yahweh himself (“my words…in my name”), with real accountability attached, even though the passage does not specify exact timing or form of consequences.