Human existence on earth is a predetermined journey, marked by continuous effort and an inevitable conclusion. Life is often experienced as a demanding period of service where every day is measured until a final purpose is fulfilled. The primary approach among commentators is that this period is not a military campaign, but rather a strict boundary and a fixed allocation of time granted to a person on earth [אבן עזרא, רלב״ג, מצודת ציון]. Just as an army is formed by assembling many individuals, a person's lifespan is constructed by gathering fleeting moments, hours, and days into a single, unified block of time [מלבי״ם].
In this reality, a person resembles a hired laborer who is employed for a predetermined period. Once the contract expires, the worker does not remain for even one extra moment; similarly, human years are strictly capped [רש״י, ביאור שטיינזלץ]. Understanding this harsh limitation, Job finds justification for his bitter cries. Knowing his limited days are saturated with forced suffering and grueling effort, he sees no reason to stay silent [רש״י, רמב״ן]. He feels like an exhausted laborer buckling under a heavy burden, desperately waiting for nightfall to bring relief from the crushing work [תקות אנוש, רמב״ן].
Furthermore, this perspective serves as a response to the arguments of Eliphaz. Job explains that humanity was created to achieve spiritual perfection, which can only be reached through a binding framework of constant, demanding service. Like a hired hand, a person is obligated to complete a specific, assigned mission [מלבי״ם].
Viewing life as a period of hired labor also provides deep insight into the nature of reward and punishment. One might wonder why the reward for fulfilling God's Commandments is not granted in this world. The answer lies in the terms of employment: a person is hired for a lifetime of service to God. Just as a laborer receives payment only after the work period concludes, a person receives their true reward only in the World to Come, after their days on earth are finished. There is, however, a strict condition to this arrangement. Unlike a slave who might still be supported while ill, a hired worker is compensated only for actual, active labor. This is the source of Job's deep distress over his illness. His sick days force him into idleness, preventing him from actively working and accumulating merit [חומת אנך].
Conversely, this dynamic between employer and worker reveals God's profound kindness. Since God provides the very gift of life and time, it would be entirely appropriate for a person to serve Him for free, simply out of gratitude. Yet, God chooses to treat humanity like hired workers, generously assigning a reward for every single day of active service [אלשיך].