Shared ground
Isaiah 56:6–7 says that “foreigners” are not automatically shut out from Israel’s worship. The text pictures them actively attaching themselves to Yahweh, shown by concrete loyalties: serving him, loving his name, keeping the Sabbath as holy, and holding tightly to God’s covenant (explicit textual claims).
The promised outcome is direct: God will bring such foreigners to “my holy mountain,” give them joy in “my house of prayer,” and accept their sacrifices on his altar (explicit textual claims). The closing line explains the direction of the temple’s purpose: it is to be called a prayer-house “for all peoples,” not only one ethnic group (explicit textual claim).
Where interpretation differs
Some readers take this as describing full incorporation: foreigners become genuine members of God’s worshiping community, with real standing before God, not merely tolerated visitors (inference from “my servants,” “accepted on my altar,” and “house of prayer for all peoples”).
Others read the same lines more narrowly: the welcome is real, but it still assumes boundaries set by covenant life and temple order; “accepted sacrifices” may mean participation as worshipers without settling every question about equal access in every part of temple space or community life (inference from the listed conditions and from how temples functioned).
Why the disagreement exists
The passage gives strong inclusion language (“all peoples,” “joy,” “accepted”), but it also lists specific covenant markers (Sabbath-keeping, holding fast the covenant). Because it does not spell out the social mechanics—residence status, legal standing, or temple-court access—people infer different pictures of how complete the inclusion is.
What this passage clearly contributes
It ties worship access to committed allegiance to Yahweh rather than ethnicity (explicit). It also frames the temple not as a private national shrine but as a public center meant for prayer that faces outward to the nations (explicit). And it connects inclusion with a defined pattern of loyalty—service, love for Yahweh’s name, Sabbath holiness, and covenant commitment—rather than treating belonging as purely symbolic (explicit).
