The Torah, “Leviticus”, 23:29 – 23:32: For any person who will not be afflicted on that very day, shall be cut off from its people. And any person who performs any work on that very day I will destroy that person from amidst its people. You shall not perform any work. [This is] an eternal statute throughout your generations in all your dwelling places. It is a complete day of rest for you, and you shall afflict yourselves. On the ninth of the month in the evening, from evening to evening, you shall observe your rest day.
Because the day begins in the evening, the Torah commands us to observe Yom Kippur by resting from one evening to the next. If a person comes close to a state of atonement and forgiveness, clarifies, and feels it correctly, he totally refuses to do anything on that day because all his actions will stem from his finite ego. A person who has not yet decided and tries to do something hinders his advancement and corrupts his soul.
Therefore it says: For any person who will not be afflicted on that very day [Yom Kippur], shall be cut off from its people, because the desire with which a person could have begun his ascent is gone and is concealed from him. Only if he performs many different actions will he be able to get another chance to feel and understand it. These actions help him return to the same state, but with a different clarification that is deeper, more correct, and helps him go through this state properly. But he prolongs his path this way.
From KabTV’s “Secrets of the Eternal Book” 18/6/14