At the heart of it lies the dance between the will to receive and the light. Think of the "will to receive" as pure potential, the raw desire to experience and be filled. And the "light"? That's the divine energy, the boundless goodness that seeks to give and share.

Now, here's the twist. When these two are bound together, when the will to receive is completely saturated with light, something interesting happens. The will to receive is, paradoxically, negated. It's like trying to see the stars at noon; the sun is so bright, it drowns everything else out.

Why is this important? Because, according to the wisdom of Kabbalah, a created being, anything that comes into existence, can't reach its final, defined form until the light has been withdrawn, even if just once.

Imagine a sculptor working with clay. They need to step back, to see the form emerging, to know where to carve and shape. It's the same principle. Only when the light is removed, when that initial intense connection is lessened, does the will to receive truly begin to yearn. And it’s this yearning, this intense longing for the light, that actually determines and finalizes the form it will take.

Think about it: it's in the absence that we truly define what we desire. It’s when we miss something, that we fully appreciate its value and understand our need for it.

So, what happens when the light returns? When that divine energy re-enters the picture and clothes itself in the form that the will to receive has taken? Bam! At that point, we have something that can be defined as having two distinct elements: vessel and light, or body and vitality.

The vessel, or body, is the form shaped by longing. The light, or vitality, is the divine spark that fills it. These two elements are interdependent and necessary for existence as we understand it.

It’s a concept worth pondering, isn't it? This interplay between absence and presence, between desire and fulfillment. It’s not just a theoretical idea; it’s a blueprint for understanding creation itself, and perhaps even a guide for understanding our own journeys of growth and transformation. Consider it carefully; as the text says, it is the most profound of ideas.