Aligned sentence by sentence
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This word, “holiness,” its meaning and what it requires is preservation and cleanliness and purity and what is similar to this. And since the day is a time and these cannot apply to it, meaning time cannot be cleaned or purified, it must be that the verse’s “to keep it holy” refers to the people. And they should be holy and pure and clean and preserved from pollution and impurity from things that pollute and cause impurity, with the exception of what is unavoidable such as menstruation and bodily impurities and what is similar to this from the impurities that appear necessarily since these are not from his actions or his choice. Rather, it is forbidden on him the impurities that he acquires upon himself voluntarily, and not out of necessity requiring this, and this is like sexual intercourse, and approaching things that are impure and polluted and what is similar to these. And the Rabbanites permit sexual intercourse on the Sabbath and even exagerrate in mockery one who withholds from this and practically consider this an obligation. Thus let us now discuss the prohibition on sexual intercourse on the Sabbath.