See: on Rav Hai Gaon, Igros Kodesh, vol. 18, no. 6654.
In the Alter Rebbe's Shulchan Aruch: Orach Chaim, Siman 88.
1. The Unique Status of the Jewish Body and Mikveh
Shaarei Halacha U'Minhag (section 37?) discusses the tremendous advantage of using the mikveh—ritual bath—to purify oneself. The Rebbe emphasizes that a Jewish body is not just physical but is considered a holy vessel, an acquisition of HaKadosh Baruch Hu—the Holy One, blessed be He. This perspective is rooted in the teachings of both earlier and later Rishonim and Acharonim—the classic Torah authorities from different eras—whose words form the basis for our halachic practice. Their consensus is that immersion in the mikveh is not limited to cases of impurity caused by bodily discharge (tumah) but extends even to transitions from one level of purity (taharah) to a higher one.
2. Levels of Purity and Stages of Immersion
There are multiple levels and steps in ritual purity, as illustrated by the sages’ enumeration of five distinct stages. For example, someone who immerses for chulin—ordinary food—may still remain impure with respect to eating maaser—tithes, which require a higher level of purity. This demonstrates that immersion can serve to elevate a person from one degree of taharah to another, not only from impurity to purity.
3. The Relative Significance of Immersion at Different Times
The Rebbe cites his father-in-law’s teaching that immersion in the mikveh is not equal at all times. There are gradations: weekdays in general, days when the Torah is read (Mondays and Thursdays), fast days, Erev Shabbos, Erev Yom Tov, Erev Rosh Hashanah, Erev Yom Kippurim, and then Shabbos and festivals themselves. Although there may be some discussion about the precise order, the essential point remains that certain times carry greater spiritual significance for immersion.
4. The Deeper Meaning of Mikveh: Rambam and Chassidus
Drawing on the Rambam’s precise language at the end of his tenth book, the Rebbe explains that immersion in water hints at immersing one’s soul in “the waters of knowledge.” As stated in the Mishnah at the end of Yoma: just as a mikveh purifies those who are impure, so too does Hashem purify Israel. The Rebbe also references a maamar from the Alter Rebbe regarding mikveh and its inner intentions (Kavanos HaMikveh). In addition, even though Tvilas Ezra—the requirement for immersion before prayer or Torah study after certain impurities—was nullified because people could not withstand its stringency, bodily purity still greatly assists especially with davening, as cited by Rav Hai Gaon and explained further in Chassidus (see Likkutei Torah).
5. The Ongoing Value of Mikveh Despite Nullification of Tvilas Ezra
The Alter Rebbe notes (in Likkutei Torah) that although Tvilas Ezra was nullified as an absolute obligation, davening is more readily accepted when preceded by immersion. The Rebbe goes further to say that for davening, mikveh is even more important than learning Torah itself. In correspondence, he rebuked someone whose brother only used the mikveh once a year on Erev Yom Kippur, stating this practice is unacceptable since regular immersion strengthens both one’s emunah—faith—and general spiritual purity.
6. Practical Guidance: Frequency and Health Considerations
The Rebbe advises influencing others—especially those living in Eretz Yisroel where Hashem’s providence is constant—to immerse more frequently, at least fulfilling minimally the obligation associated with Tvilas Ezra. If health concerns arise regarding immersion, it is known from our Rebbeim that one who accepts upon himself to immerse need not fear any harm will result; this assurance is also attributed to the Baal Shem Tov.
7. Substitutes for Mikveh: Mishnayos Study and Hand Washing
When actual immersion is impossible (such as due to health or total duress), studying Mishnayos—preferably tractates dealing with purity laws like Seder Taharos or Maseches Mikvaos—can serve as a substitute only for additional levels of taharah but never for Tvilas Ezra itself. The Rebbe stresses that learning Mishnayos cannot replace Tvilas Ezra where it applies. Some have suggested washing hands as a substitute for mikveh based on certain sources. However, the Rebbe clarifies this only applies regarding additional taharah but does not help at all when transitioning from tumah to taharah proper.
8. Summary: Centrality of Mikveh in Spiritual Life
In summary, regular use of mikveh elevates both body and soul, enhances prayer more than even Torah study alone, and serves as an ongoing means to strengthen faith and spiritual connection—especially when performed with proper intent and awareness of its deeper significance as taught by Chassidus and halachic authorities throughout generations.