Shared ground
Bildad ends by restating his main contrast: God does not “cast away” the blameless, and God does not “uphold” people who do evil (v.20). He then applies that claim to Job with a picture of reversal—laughter and audible joy instead of grief (v.21). Finally, he describes a public ending for Job’s opponents: visible disgrace, and the disappearance of the wicked person’s “tent,” meaning their household stability and standing (v.22; shame).
These lines present a moral universe where God’s support and a person’s long-term security are connected to character. They also assume that vindication and disgrace are not only internal feelings but social realities.
Where interpretation differs
A key question is whether Bildad’s statements are meant as an exceptionless rule (“this is always how God acts in each case”) or as a general pattern (“this is how things normally work, even if there are puzzling cases”). Another question is how to take v.21: as a direct promise from God, as Bildad’s confident prediction, or as persuasive encouragement built from his principle in v.20.
Why the disagreement exists
The wording is broad and absolute-sounding (“will not… neither will he…”), which can read like a fixed rule. But the book’s larger storyline places pressure on any simple equation between righteousness and immediate outcomes, so readers differ on how tightly to read Bildad’s claims. Also, v.21 directly addresses Job (“your mouth… your lips”), but the speaker is Bildad, not the narrator—so readers weigh how much authority to assign to Bildad’s confident conclusions.
What this passage clearly contributes
Explicitly (in the text): Bildad claims God does not reject the blameless and does not support evildoers (v.20). He pictures Job’s possible/expected emotional reversal into public joy (v.21). He predicts shame for those who hate Job and the end of the wicked person’s “tent,” a metaphor for household security and continuing place (v.22).
By inference (from how it is framed): Bildad’s closing shows how wisdom reasoning can move from a general belief about God’s justice to very concrete expectations about outcomes—public joy for the upright, public collapse for the wicked. The passage also highlights the social dimension of “vindication” and “shame” in this setting: people are seen as restored or disgraced in front of others, not only in private feelings.