For the source text click/tap here: Sukkah 25
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The teaching in the mishna on our daf is explained in the gemara as an example of a well-known rule that “One who is involved in a mitzvah is exempt from a different mitzvah.” Rav Huna derives this rule from the mitzvah of saying the “Sh'ma”. The verse states that “Sh'ma” is a mitzvah to do when “going in your way” – but not while in the middle of going in a way commanded by G-d — i.e. a different mitzvah.
The Gemora asks: If that is so, one who marries a widow should also be exempt? The Gemora answers: This one (who marries a virgin) is preoccupied for he is worried about her besulim; the other (who is marrying a widow) is not.
This leads us to explore the notion of multi-tasking which afflicts every aspect of our lives and whether there is a neurological substrate for these behaviors and are they healthy?