A man suffocating under the weight of his own suffering often feels as though the universe itself has mobilized against him. In the depths of his pain, Job cries out, wondering why God applies such an immense, restraining force against a fragile human being, treating him as though he were a destructive element of nature.
The commentators agree that this plea is built upon the imagery of natural forces and wild creatures whose raw power must be contained. Job asks if he is like the raging sea that threatens to drown and destroy the entire world, requiring a boundary of sand to keep it from overflowing its banks. Alternatively, he wonders if he is akin to a massive sea monster, a giant fish, or a monstrous primeval creature that must be locked away in the ocean depths so it cannot harm the inhabited world [מצודת ציון, רש״י, שטיינזלץ].
Drawing from these dramatic images, Job questions why a strict guard has been placed over him. The primary approach among commentators views this guard as a metaphor for being imprisoned within his own suffering and being denied the release of death. Job laments that he is trapped in his life with no way to escape, enduring constant waves of pain without any relief, whether he is awake or asleep [רמב״ן, מצודת דוד]. Moreover, Satan himself was appointed to guard Job's body specifically to prevent his soul from departing, forcing him to continue living and suffering. Job questions whether his death and the release of his soul would somehow destroy the world, asking why God insists on keeping him alive with such overwhelming force [רש״י, אלשיך].
On the other hand, a different perspective interprets this guard as a strict silencing. According to this view, Job is asking why a muzzle has been placed on his mouth to prevent him from speaking out and complaining about his condition. He wonders if his words are truly so dangerous that merely opening his mouth to express the pain in his heart would cause catastrophic damage to the world, much like the unrestrained sea or a wild sea creature [מלבי״ם].