ויקרא, פרק ט״ז, פסוק כ״ט

The atonement of Yom Kippur does not rely solely on the service of the High Priest in the Temple; rather, it demands the active, internal participation of every individual. Beyond the offering of sacrifices, achieving forgiveness requires physical submission and an absolute cessation of work, allowing a person to focus entirely on purity of heart and repentance. This requirement is an eternal statute, remaining in effect for all time regardless of whether the Temple stands [ספורנו, אלשיך]. The obligation rests upon the entirety of the Israelites without exception. This universal application prevents any misconception that profoundly holy leaders, such as Moses, Aaron, or the priests actively engaged in the sacred Temple service, might be exempt from fasting due to their elevated spiritual status [אור החיים].

The precise timing of this day occurs in Tishrei, the seventh month. This month holds deep significance as the time when humanity was originally created, judged, and forgiven, thereby establishing it for all generations as a season of pardon and atonement [שפתי כהן, שטיינזלץ]. The specific date is fixed to clarify that the fast cannot simply be made up on another day if missed [מלבי״ם]. At the core of the day is the command to afflict the soul. The primary approach among commentators understands this exclusively as the withholding of food, firmly rejecting any interpretation that calls for active physical self-harm or torture. The Torah intended a form of affliction that acts as a great equalizer. Through the passive restraint of fasting, every individual, regardless of their wealth, status, or physical strength, experiences hunger and thirst in the exact same manner [רמב״ן, אבן עזרא, שד״ל, מלבי״ם]. Building upon this foundation, the sages expanded the concept of affliction to include prohibitions against washing, anointing, wearing leather shoes, and marital relations [בכור שור, תורה תמימה].

Beyond its legal parameters, the fast possesses a profound internal dimension. Withholding food is designed to subdue material desires. When a person fasts and directs their heart toward heaven, they effectively transform their own body into an altar, offering their diminished physical energy before God as a personal substitute for a physical sacrifice [רקנאטי]. This physical affliction, when combined with the underlying joy of achieving atonement, helps a person abandon negative behaviors and achieve complete repentance [אלשיך, פרדס יוסף]. To fully enable this spiritual focus, an absolute prohibition on work is enforced. Unlike other festivals where preparing food is permitted, the restrictions on Yom Kippur are identical to the strict laws of Shabbat. This encompasses any creative action or thought, including the performance of other Commandments or minute actions that carry no formal penalty [מלבי״ם, תורה תמימה, רש״ר הירש]. This total halt to daily labor is designed to completely sever a person from worldly burdens, leaving them entirely free to engage in prayer and seek mercy [בכור שור].

The mandate of the day applies equally to the native-born and the convert. The native is described conceptually as a deeply rooted, flourishing tree, and the specific phrasing used to define them serves to explicitly include women in the obligations of the fast [מלבי״ם, תורה תמימה]. The inclusion of the convert refers to a righteous individual who has fully accepted the Torah, extending the obligation to those who have long been settled in the community, along with their households [מלבי״ם, אור החיים]. On a deeper level, the term for a convert shares a linguistic connection with conflict and warfare. Unlike a native who was raised within the traditions of the Torah, a convert faces a constant internal battle against the habits and worldly desires that were once permitted to them. Withstanding this test, especially on a day defined by physical deprivation, demands extraordinary spiritual heroism [הכתב והקבלה]. Furthermore, the explicit mention of the convert ensures that one who has just recently embraced the faith is not mistakenly viewed as a newborn child exempt from the fast; rather, they are immediately bound by all the solemn duties of the day [רד״צ הופמן].