Shared ground
These verses portray wrongdoing as deliberate, not accidental. The wicked person is pictured preparing violence like someone sharpening a sword and stringing a bow (vv. 12–13). The images stress planning and escalation rather than a sudden outburst.
The poem also treats evil as something that grows from inside to outside. Wrongdoing is pictured as a pregnancy that ends in a “birth” of falsehood (v. 14). The result is not only harm but also deceit that now exists in the open.
Finally, the passage presents a reversal: the one who sets traps is caught by them. The pit he dug becomes his own downfall, and the violence he intended “returns” onto his own head (vv. 15–16).
Where interpretation differs
A main question is who “he” refers to in vv. 12–13. Some read the subject as God: if the wicked does not turn back, God sharpens his sword and prepares weapons for judgment. Others read the subject as the wicked person: if he does not relent, he keeps arming himself to attack.
Another question is how to understand the reversal in vv. 15–16. Some take it as God actively arranging consequences (a moral order enforced by divine judgment). Others understand it more as how evil often collapses under its own weight in human life—plots backfire, lies unravel, violence provokes retaliation—without specifying exactly how God brings it about.
Why the disagreement exists
The language is highly metaphorical and uses a series of “he” statements without restating the subject. In Hebrew poetry, that can allow a quick shift in viewpoint. Also, the reversal language (“return” onto his own head) can describe direct divine action or a predictable outcome built into the way violence and deceit work.
What this passage clearly contributes
Explicitly, the text claims that persistence in evil leads to further preparation for harm (vv. 12–13), that inner wrongdoing produces outward falsehood (v. 14), and that traps and violence rebound on the perpetrator (vv. 15–16). Theologically inferred from these images is a moral logic to the world: evil is self-defeating, and the end of violence is not control but collapse. The passage also supports the broader Psalms theme that human agency is real—people plan and “make ready”—and yet the outcome can overturn their intent (compare Psalm 7:15).