The reason which teaches a man his duties is not very complex; the reason which teaches a woman hers is even simpler.
 Jean-Jacques Rousseau, Emile, or On Education (1762). copy citation

add
Author Jean-Jacques Rousseau
Source Emile, or On Education
Topic duty reason
Date 1762
Language English
Reference
Note Translated by Barbara Foxley
Weblink http://www.gutenberg.org/cache/epub/5427/pg5427-images.html

Context

“for to make woman our superior in all the qualities proper to her sex, and to make her our equal in all the rest, what is this but to transfer to the woman the superiority which nature has given to her husband? The reason which teaches a man his duties is not very complex; the reason which teaches a woman hers is even simpler. The obedience and fidelity which she owes to her husband, the tenderness and care due to her children, are such natural and self-evident consequences of her position that she cannot honestly refuse her consent to the inner voice which is her guide, nor fail to discern her duty in her natural inclination.” source