224. Yesod de Nukva And Yesod de Dechura
The matter of the ascent of Malchut to the place of the Eynaim (eyes) is called Yesod de Nukva. This is because Nukva means deficiency, where diminution is considered a lack. Because it is in the Eynaim, which is Hochma, it is nevertheless called Behina Aleph of the four Behinot. However, when the lower Hey is in Keter, and Keter is a desire to bestow, no diminution applies there, since there is no limitation on the will to bestow. This is why it is called Yesod de Dechura.