Taking a vow of separation is not an act of physical asceticism or self-inflicted torment. Unlike various ascetic practices that involve fasting or physical affliction, which ultimately weaken a person's ability to serve God [ספורנו, הכתב והקבלה], this commitment serves a profoundly different purpose. Abstaining from wine is designed to subdue physical desires, preserve mental clarity, and maintain a tranquil spirit. By distancing oneself from intoxication, which clouds the intellect, a person removes barriers to spiritual elevation and prophecy [ספורנו, רש ר הירש, אם למקרא]. In this state, the individual achieves a supreme spiritual level considered even higher than that of a High Priest. Just as a priest must prepare before entering the Temple, the individual is required to avoid anything reminiscent of wine in order to achieve absolute sanctification and dedicate themselves entirely to God [רבנו בחיי, רש ר הירש, הכתב והקבלה].
The primary approach among commentators is that standard wine refers to new, relatively weak wine, while strong drink refers to aged, highly intoxicating wine. An alternative perspective suggests that the former refers to wine diluted with water, whereas the latter indicates pure, unmixed wine [ספרי, תורה תמימה, הכתב והקבלה, מלבי״ם]. Interestingly, while priests are sometimes forbidden from consuming any intoxicating beverage, this specific vow is strictly limited to products derived from the grapevine. Intoxicants made from other sources, such as dates or figs, remain entirely permitted [תורה תמימה, הכתב והקבלה, נתינה לגר].
The requirement to separate from the grapevine is absolute. The individual must distance themselves so completely that they are forbidden even to trade in wine or use it for medicinal purposes [תורה תמימה, צפנת פענח]. This obligation is so powerful that it overrides even a pre-existing Commandment to consume wine, such as when a person previously swore an oath to drink wine and subsequently took this vow [תורה תמימה, מלבי״ם]. Recognizing the stringency of this absolute separation, the sages established a practical boundary, advising the individual to walk entirely around a vineyard rather than risk drawing near it [העמק דבר].
This strict distancing extends to wine vinegar, creating an additional protective boundary. Even though the fermentation process has fundamentally altered the taste, the prohibition remains fully intact because the liquid originated as wine [רבנו בחיי, אבן עזרא, רלב״ג]. Furthermore, any liquid in which grapes have been steeped is forbidden. Commentators explain this steeping in two ways. Some describe it as the act of dipping or dyeing an object in liquid [רש״י, שפתי חכמים], while others look to the Aramaic root of the concept, suggesting it refers to the dissolving of grape particles into water [רשב״ם, שד״ל, רש ר הירש]. From this concept of steeping, two fundamental legal principles emerge. First, the taste of a forbidden substance is treated with the same severity as the substance itself; if grapes are soaked in water until the water tastes like wine, the liquid is forbidden even if it contains no actual wine. Second, permitted items can combine with forbidden ones to constitute a violation. For instance, if permitted bread is dipped in wine, and the combined volume reaches the threshold for punishment, the individual is held fully liable [תורה תמימה, בכור שור, חתם סופר, מלבי״ם].
The restrictions move beyond beverages to include the consumption of the fruit itself, both in fresh and dried forms. The inclusion of fresh grapes extends the prohibition to even unripe fruit that retains only a minimal amount of moisture [תורה תמימה, צפנת פענח, מלבי״ם]. By explicitly detailing both fresh grapes and dried raisins, a clear legal distinction is made. Although they are the same fruit, consuming each state constitutes a separate violation carrying its own distinct penalty [תורה תמימה, מלבי״ם]. Ultimately, the individual is cautioned against five specific elements derived from the vine: wine, fresh grapes, raisins, the seeds, and the skins [רבנו בחיי].