You've already met the core of the Creation story: the Light, the Vessel and the Restriction. The later Kabbalists added a dramatic next chapter, and it gives Rav Berg's practical teaching much of its urgency.
The empty space
When the Vessel restricted, the Light withdrew and left an empty space – what Rav Berg described as the moment of the Big Bang, the birth of time, space and motion. Into that emptiness a single, thin ray of Light entered again, carefully measured, so the Vessel could receive in a way it could earn.
The shattering of the vessels
In the Lurianic story, the first vessels built to hold that ray couldn't contain it. They shattered. Sparks of Light fell into the lower worlds, trapped inside husks of darkness that Kabbalah calls klippot ("shells"). Our world, in this picture, is full of these hidden sparks – in people, places, objects and moments.
Lifting the sparks
This is where you come in. Every time you act from sharing instead of self-interest, you free a spark from its shell and return it to its source. Eating, working, loving, even struggling can become ways of lifting sparks when they're done with the right consciousness. Rav Berg presented this as the purpose of ordinary life: nothing is too small to be spiritual.
A story, not a lab report
Rav Berg enjoyed pointing out resemblances between this story and modern cosmology – an original point of infinite energy, a sudden expansion, a universe of scattered fragments. It's a striking parallel and a helpful way to picture the idea. It's best held as poetry that inspires, not as a claim that Kabbalah predicted physics.