This is one story about how the universe was born.
There is a school of thought in Qabalistic circles that the Tree of Life originally had just four sepira. It was perfect. Nothing moved. Nothing breathed. Nothing died. Nothing loved.
And that was just too stupid. So we cracked it open, dropped the bottom out of the whole shebang and came up with the universe. All sorts of things happening now.
What was the sound of the Tree falling at the beginning of time? It was the sound of a billion billion particles of light bursting out of a singular point of possibility. Duh.
We call the stuff that fell furthest “matter” and some people believe that's all that's left of the Big Bang. These materialists can't tell you why the Big Bang happened nor anything about what happened right before, but they will think you are awfully silly if you think there's more to the universe than this far-flung stuff.
Other people believe that this far-flung stuff is eeeevil. Flesh is evil, sex is evil, eating is evil. They call the distance we've fallen a sin and work to flee towards the center by leaving all this shit behind.
But every bit of stuff, no matter where it landed, was once part of perfection. So what really fell? G*d (whatever that is.) We did this. We the people, and the animals, the plants, the minerals. Thoughts had a hand as did hunger, beauty and sorrow.
The story goes that the journey back to the perfect source is actually amazing. We can't always tell because we're too caught up in it. And it's not really a journey back because we are what we came from and by journeying we are changed. But whatever...
The stuff that fell furthest is the stuff that has the longest journey. It's the stuff that believed in the plan the most, leaped off the cliff with the greatest trust and the biggest YEEHAW! Let's get this incarnation party started! They say that's why Malkuth, the lowliest sepira, the kingdom of Earth, looks up at Kether, the Crown, and blows kisses.
That's the story, anyway.