Eyn Sof, blessed be He, will then be said to have completed His works... This is the whole cycle, for this entire cycle was required in order to reveal the unity, and when it is completed, all the work that had to be done is complete. From then on the unity will already have been revealed, and all subsequent ascents will be in accordance with the unity already revealed and will therefore follow a different path. This is the mystery of the rest (מנוחה, menuchah) enjoyed by the world in the seventh millennium. The whole process from the beginning of the concealment until the revelation of the unity takes place for the entire duration of the first six millennia. This whole process was precisely what was needed in order to demonstrate clearly the truth of what was known already.
Eyn Sof's Vision
Kalach Pitchei Chokhmah 49:36