The Zohar, Chapter “Bo (Come Unto Pharoah),” Item 63: Accordingly, Bina, Tifferet and Malchut of the still Nile, too, fell into Keter and Hochma of the Niles during the Katnut. During Gadlut, the still Nile, too, elevates its Bina, Tifferet and Malchut to it, and with them rise the Keter and Hochma of the Niles, which receive GAR from him.
There is a great, still river, the Nile that is connected to all the small Niles (rivers) through their Galgalta Eynaim. This big Nile annuls its AHP (this is why it’s called still) in order to let the small ones connect with it. It waits for them, and as soon as they become connected it begins lifting them along. Thus, they rise from their own level to the next one.
At the higher level there is another “still Nile (river).” They connect to it and rise even higher. This is the way the “spiritual elevator” works. What seems to be darkness is always the concealed Light. Therefore, there is no darkness. It’s only dark because of my egoistic attitude to the Light; this is why the Light becomes concealed. It shines to me with its opposite side, which is why the Hebrew word for Light is “Ohr,” while in Aramaic the word “Ohrta” means night. It is for this reason that these two languages are opposite to one another like a front and back side.
Darkness doesn’t exist. It exists only with regard to our uncorrected desires. There is no darkness in the corrected desires. Therefore, as soon as I am in a bad mood and lack inspiration, it means I have an opportunity to awaken myself and attain a greater connection with the Upper One precisely through the darkness I feel.