Why the difference of 1 year between girls reaching obligation in mitzva observation versus boys? (a girl's Bat Mitzva = 12 years old, while boy's Bar Mitzva = 13 years old)

Is this due to girl's reaching intellectual maturity faster in this area or perhaps some other reason.


The Teshuvos Ha'Rosh (Klal 16-1) as well as other Rishonim point out that the age of Bar/Bas Mitzvah is a Halacha Li'Moshe Mi'Sinai and they imply that no ta'am was given. However since the concept of Bar/Base Mitzvah is intrinsically based on the concept of leaving the status of katnus (which is compared to being a shoiteh by Chazal) and entering the stage of pikchus (intellectual maturity) it would appear that in Hashem's eyes - at least with regards to understanding the concept of being responsible to do the will of Hashem and serve Him - girls do reach this stage of maturity earlier than boys.

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    do you have a source for that last statement? – ray Jan 15 '17 at 21:45
  • @ray. No. I just figured it would be a logical deduction based on the the way Chazal understand the status of a katan. No source though. – Mark A. Jan 16 '17 at 4:10

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