Shared ground
Isaiah 54:15–17 presents Yahweh as the decisive ruler over threats against “you.” The passage assumes real hostility: opponents can “gather,” weapons can be made, and accusations can be raised “in judgment.” Yet the outcome is framed in advance: opposition does not achieve its purpose (textual claim: “No weapon…shall prosper”; “every tongue…you shall condemn”).
It also places the whole threat system under Yahweh’s reach: he “created the smith” and “created the waster to destroy” (textual claims). That does not deny human agency, but it denies that hostile power operates outside divine control.
Where interpretation differs
Who “you” is. Some readings take “you” mainly as the restored city/community addressed in Isaiah 54 (Zion/Jerusalem as a people). Others allow a broader extension to Yahweh’s “servants” generally, since v.17 ends by naming the promise as their “heritage.” A few also read “you” as focused through a representative figure, but the chapter’s dominant address is corporate.
What “not by me” means. Many take it as “not authorized/commissioned by Yahweh” (the gathering is illegitimate). Others take it more as “not assisted by Yahweh,” emphasizing that hostile plans lack divine backing even if they still occur.
How to read “created” (smith/destroyer). Many understand this as asserting Yahweh’s sovereignty over makers of weapons and agents of ruin without implying approval of violence. Others worry the wording suggests God directly appoints destroyers; they respond by stressing the verse’s aim: threats are not ultimate and do not escape God’s governance.
Why the disagreement exists
The Hebrew expressions are compact and can carry more than one shade of meaning (especially “not by me” and “fall because of you”). Also, the passage shifts from “you” to “the servants of Yahweh” and to “their righteousness…of me,” which invites readers to ask how narrowly or widely the promise is meant to apply.
What this passage clearly contributes
These verses conclude Isaiah 54’s reassurance by stating that renewed opposition will not overturn Yahweh’s restored people. The text explicitly claims (1) hostile coalitions may form but are not commissioned by Yahweh and will collapse, (2) Yahweh’s rule encompasses both the making of weapons and the forces that devastate, and (3) both physical threats (“weapon”) and verbal/legal threats (“tongue…in judgment”) will fail. The closing line grounds the protected standing of Yahweh’s servants in Yahweh’s own granting: “their righteousness…of me.” Isaiah 54:15–17