It’s a question that’s haunted mystics and philosophers for millennia. And Jewish tradition, particularly Kabbalah, offers a pretty wild answer.

Imagine a pot of milk. That’s how the sages in Bereishit Rabbah (4:7) describe the “congealment of the firmament,” that moment when everything started to solidify. Now, what happens when you add a drop of rennet to that milk? It curdles, right? It transforms into something…else. But the key is this: the rennet is just the catalyst. The real substance, the bulk of what you end up with, comes from the milk itself.

That’s our metaphor. According to Kalach Pitchei Chokhmah, the root of all physical matter lies in the Strengths, often associated with Gevurah – Judgment. Judgment, in Kabbalah, isn't just about punishment; it's about the divine power to differentiate, to set boundaries, to bring definition to the infinite potential of creation.

Now, Gevurah, or Judgment, has its own role in the grand scheme of things, in the way the world is governed. But we’re not talking about that right now. We're talking about something even more fundamental: the very stuff that’s born directly from the lights of Judgment. This is the material substance of all the separate creations.

Think of it this way: Judgment gives birth to fire and gold, not through its governance, but from its very essence, from the actual lights that emanate from it. Likewise, water or silver emerge from Chesed – Kindness – from its own lights.

The functioning of these lights – that's the "rennet." It's the catalyst that activates the material. But the material itself, the "milk," comes from the lights themselves. So, the divine light of Judgment is the source of the building blocks of the cosmos. It's a powerful idea, isn’t it?

The Zohar, that foundational text of Kabbalah, constantly emphasizes this idea of divine light as the source of all things. It’s not just a metaphor; it’s a fundamental principle of creation.

What does it all mean? Perhaps that even the most seemingly solid, material things in our world are ultimately rooted in something far more subtle, far more divine. Maybe it’s a reminder that everything is connected, emanating from a single, unified source. And perhaps, just perhaps, it’s an invitation to look beyond the surface and see the spark of the divine in everything around us.