via Lma’an Yishme’u
If a person wants to be forgiven on Yom
Kippur, does he first have to do teshuvah? (repentance and returning to
G-d) This question is the subject of a machlokes (disagreement) in the
Gemara. Rebbi holds that even if one does not do teshuvah, the essence
of the day of Yom Kippur - the mere fact that the day has passed - grants
atonement, but the Chachomim (sages) say that Yom Kippur atones only for those
who do teshuvah. The Halachah (Jewish law) follows the view of the
Chachomim.
The (Lubavitcher) Rebbe explains that
everyone agrees that the atonement of Yom Kippur is brought about by the kedushah
(holiness) of the day; it is only that to attain that kedushah one is
required to do teshuvah.
Originally Posted by Mystical Paths