It was already known in the beginning that God’s unity is the underlying truth (for “before the creation of the world, He was one and His name was one” – Zohar Chadash, Bereishit 10, Pirkey d’Rabbi Eliezer ch. 3). However, the Eyn Sof wanted to reveal this unity with total clarity in order to demonstrate the greatness of His perfection. To do so, He had to produce a great work – the concealment of this very perfection to the point that deficiencies would come into being, until in the very end it would again be revealed.
This way, what existed from the very beginning is finally visible. It can then be said that He will be at rest from this work, having completed what He thought to do, and this primordial unity will then be revealed. From then on there will be eternal delight – this is the delight of the souls in the demonstration of the truth. This is the true delight, as explained earlier (Opening 4). The revelation of His unity will raise man to ever greater heights, as planned in His hidden thought.