Answer: The example of the next level is given to you by darkness. That’s because the next level first becomes revealed as darkness. However, I have to try to discern the Light in it, which is something great and special. It only seems like darkness to my ego, but if I had a desire to bestow, then I would see the Light and the entire system of souls that are filled by infinite Light.
Therefore, darkness is the example of the future degree, until I turn this darkness to Light.
From the 2nd part of the Daily Kabbalah Lesson 1/23/11, The Zohar