Shared ground
Isaiah 66:1–4 opens by setting God’s size and authority against human attempts to manage him. Heaven and earth already function as his “throne” and “footstool,” so a human-built “house” cannot contain him (explicit: vv.1–2). The passage then shifts from impressive religious projects to the kind of person God “looks to”: someone brought low, inwardly crushed, and responsive to God’s word (explicit: v.2).
The text also insists that worship can be morally reversed. In the situation described, standard sacrifices are treated as comparable to acts that are clearly offensive—violence, impurity, and idol devotion—because the worshipers have deliberately their own ways and take pleasure in what God calls detestable (explicit: v.3). God’s response matches their stubbornness: he brings on them what they dread because they refused his call and did what he said was evil (explicit: v.4).
Where interpretation differs
Some readers take “house” mainly as a warning against trusting the temple as a guarantee of God’s favor; others take it as a broader critique of any attempt to domesticate God through religious systems (inference from v.1’s questions).
“Poor” in v.2 is also read in two main ways: as literal material poverty, or as being socially/spiritually humbled (pressure point noted in Stage A). The verse itself leans toward a posture—“contrite” and “trembles at my word”—but it does not exclude economic need.
A further question is how v.3 works: whether it is strong rhetorical shock language (“as offensive as…”) or whether it claims an almost one-to-one moral equivalence in God’s evaluation when worship is corrupt. Either way, the main thrust is that ritual does not cancel rebellion (explicit: v.3).
Why the disagreement exists
The passage uses compressed poetry and comparisons. It also speaks about temple and sacrifice—things that can be either commanded elsewhere in Scripture or misused as substitutes for obedience—so readers differ on how specific the target is (temple building itself, temple-confidence, or self-directed worship in general).
What this passage clearly contributes
It presents God as uncontained creator and ruler (vv.1–2) and defines acceptable worship by humility and responsiveness to God’s word rather than by impressive religious output (v.2). It also teaches that self-chosen religion can become deeply offensive to God, so that even normally legitimate offerings are treated as repugnant when paired with delight in what God rejects (v.3). Finally, it portrays divine judgment as a fitting answer to persistent refusal to listen (v.4), not as an arbitrary reaction.