The Zohar, "Introduction of The Zohar," Chapter "BeLaila DeKala (On the Night of the Bride)": …at the great Zivug of the end of correction, the light of the moon will be as the light of the sun, as it is written, “When in the evening time there will be light.” Thus, her degrees are doubled, since during the 6,000 years in the state of the moon she was “and there was evening and there was morning.”
Eventually all of our descents, all of the dark nights join the Light of day, the revelation of the Light. Day and night become one whole. In reality this isn’t talking about "doubling" or even multiplying by 620 times, the way it is written.
At first the Creator gave me a small spark, and did not give me anything else. Then, by working on my desire, I turn to the Creator, the Light, and demand corrections. Thanks to these corrections I become similar to the Light with my qualities and the Light clothes into me.
Inside my desire the Light is perceived as infinite and boundless. Why? The matter is that when the desire for pleasure begins to grow inside us, it discerns and forms itself independently. The previous sensation was left to it from the Reshimot that descended from Above downwards, and they are completely different from the ones it now realizes.
As a person ascends, on every level he realizes himself according to previous Reshimot, but he adds his aspiration, efforts, and descents to them. He reveals the gap between himself and the Light, the gap which was never revealed before.
A person is separated from the Light and aspires after it. The Light comes, but then a descent comes; this happens again and again, and thanks to all of these experiences, which throw him from end to end, a person finds new details in his desire.
He discovers unprecedented depth, a completely new Kli, an independent yearning, an unheard of aspiration to the Light. Previously not one desire or Reshimo were recorded in his account, but now, when he makes efforts, even if it is done in a childish manner, it forms new Kelim inside him.
That is why the Light that now becomes revealed incomparably exceeds the Light that filled the desire before the breaking, before our work on the path upwards. The descent of the worlds and all the efforts until now were just a general preparation to the real correction. In it the smallest Light, the Light of Nefesh, is revealed.
Baal HaSulam writes that very small Lights were revealed before, but now, when our generation begins to correct itself, it attracts the greatest Light in all the worlds – the Light of NaRaNHY.
From the 1st part of the Daily Kabbalah Lesson 11/16/10, The Zohar
Where’s The Pleasure?