Shared ground
Acts 2:5–13 presents Pentecost as a public event among a wide-ranging Jewish crowd in Jerusalem. Luke stresses diversity (“from every nation under the sky”) and intelligibility: people recognize that they are hearing speech in their own local languages (language). The surprise is heightened because the speakers are identified as Galileans, not cosmopolitan elites.
The passage also shows that the miracle creates a demand for interpretation. Some listeners respond with amazement and questions (“What does this mean?”), while others offer a dismissive alternative (“They are filled with new wine”). Luke frames the moment as a fork in perception: the same event can be treated as revelation about “the mighty works of God,” or reduced to a social explanation.
Where interpretation differs (only where needed)
Who exactly is in the crowd. Some read “dwelling at Jerusalem” as mainly long-term residents who had settled there from other regions. Others read it as festival-time visitors (or a mix), since major feasts drew large numbers into the city.
How the language miracle works. Many understand the disciples to be speaking real human languages they had not learned, which the crowd then hears normally. Others think the key miracle is primarily on the hearing side: one speech-event is perceived by different listeners as their own language. Some take a combined view (Spirit-enabled speaking that results in each hearing their own language).
How literal “from every nation” is. Some take it as intentionally broad but not mathematically exact (a way of saying “a very wide spread”). Others press it more literally, seeing Luke emphasizing that the diaspora is comprehensively represented.
Why the disagreement exists
The wording can support more than one scenario. “Dwelling” can mean residence or being temporarily present. The repeated focus on “hearing” (hear) and “in his own language” can be read as describing either the crowd’s experience (what they receive) or the disciples’ action (what they produce). And “every nation” can function either as rhetorical emphasis or as a factual claim about the full range.
What this passage clearly contributes
Explicitly, Luke claims: devout Jews from many places are in Jerusalem; a sound draws a crowd; each person hears the disciples in their own local language; the speakers are Galileans; many regions are represented; the message content is “the mighty works of God”; and the crowd splits between puzzled openness and mocking dismissal. Theologically by inference, the scene portrays the Spirit’s work as outward-facing and understandable across cultural and language boundaries, while also showing that public signs alone do not settle meaning—interpretation and response remain contested (setting up Peter’s explanation in Acts 2:14–36).