"A joyful mother of children"
Rabbi Yitzchak begins by saying the mother is Binah. Rabbi Shimon adds that there are two children, one male, who went to Jacob, and one female, who went to Abraham. He continues by saying that the quotation is a warning to men not to sin, for it may cause Binah to depart from the children, Zeir Anpin and Nukva. When the inhabitants perform good deeds, Binah returns to her young. Rabbi Shimon concludes by saying that happy is the portion for those who "behold the pleasantness of Hashem" and desire righteousness.
The Light of The Creator is endless, ever present, and it never changes. Darkness only exists when our Lower World disconnects from the Upper World. Disconnection occurs each time we succumb to the will of our ego and treat others with anything less than human dignity. Connection to the Upper World takes place when a man masters the drives of his ego and yields to the longings of his soul. Here we are stimulated to perform positive deeds and we strengthen our connection to the Upper World, the realm of Binah.