A long, heavy silence of mourning finally breaks, and silent suffering turns into a sharp cry. After a full week of deep, internal grief, Job shatters his quiet and directs his pain toward his very existence. Having completed seven days of mourning, he speaks up to curse the day he was born. The most direct understanding of this moment is that it serves as an honest expression of overwhelming grief over losing absolutely everything. Sitting at an unimaginable low point, he questions the value of his own life and, out of immense sadness, curses his birth and the hour he came into the world. While a day or a moment in time is not a physical object that can actually receive a curse, speaking this way is a natural reaction for someone drowning in profound sorrow [אבן עזרא, תקוות אנוש]. This reaction is not entirely unique; prophets such as Jeremiah also cursed their own births out of intense anger and despair [רמב״ן, אבן עזרא, תקוות אנוש]. Another perspective suggests he targeted the specific day of the week on which he was born, wishing for its memory to be completely erased [אבן עזרא].
While some suggest this outburst is merely a reflection of personal pain rather than an attempt to settle accounts with God [ביאור שטיינזלץ], the primary approach among commentators reveals a deep theological crisis. Knowing his own righteousness and certain he had not sinned, Job could not accept his suffering as a justified punishment. Instead, he concluded that God had removed His personal providence from humanity, abandoning people to random chance, much like animals that receive no individual reward or punishment [רמב״ן]. Driven by this thought, he adopted a fatalistic worldview centered on the power of the stars. He began to believe that a person's entire life course, including wealth, poverty, success, or failure, is permanently fixed by the stars at the exact moment of conception and birth. In this mindset, humanity lacks free will, rendering moral actions and personal effort completely meaningless. He does not deny God's awareness of the world, but rather argues that the terrible injustice he suffers stems from a cruel, unchangeable astrological decree. Filled with bitterness and convinced that not existing at all is better than a life doomed to suffering, he curses the day the stars sealed his tragic fate [מצודת דוד, מלבי״ם, אבן עזרא].
This shift in belief is viewed by commentators as a severe and problematic departure from true faith. By denying God's personal providence and blaming his destiny on the heavens, he reveals a deeply flawed way of thinking. This is precisely what his friends recognize, prompting them to answer him with harsh words later on [רמב״ן]. Furthermore, some view his act of cursing the day and night as much more than a display of sadness. It is understood as an outright rebellion against the laws of nature and the fundamental order of creation that guides the world [רמב״ן].