Kabbalah books use different images to describe the connection between Malchut and Bina. For example, they use the image of a well, either empty or full of water. An empty well, Malchut, consumes everything and remains empty. Whereas a well full of water is the proper connection of Malchut and Bina. Or the other way around, Malchut’s desire rises to Bina, into the sky, and derives water from it. This is why it rains.
Another description of a connection between Malchut and Bina is a “red heifer,” a purifying sacrifice, whose ashes purify some and, on the contrary, makes others impure. All these transitions are related to the way Bina and Malchut become included in one another: Whether Bina becomes included into Malchut or Malchut into Bina and which one of them dominates as one connection brings purification, and the other, impurity.
The “heifer” symbolizes the force of Bina, the force of bestowal, because it gives milk (the Light of Hassadim or Mercy). But if it is red (Aduma), which means that it is connected to the ground (Edom), then it is mixed with Malchut. And when the forces of bestowal and reception, Bina and Malchut, connect, it is man who determines what the resulting force will be.
If man intends to correct himself and reach bestowal, he will derive the force of bestowal specifically from this connection of forces called “a red heifer” and will purify himself. But if he was already pure, then a new egoistic desire becomes revealed in him, and if he is yet unable to work with it, he becomes impure.
The Torah provides detailed instructions on finding a red heifer and burning it, and what then needs to be done with the ashes. These are not simple actions because none of this exists in our world, even though scientists are searching for the traces of a red heifer to prove that it once existed, but now has disappeared.
During the times of the Temple, the entire nation was on a spiritual degree due to the wisdom of Kabbalah, as it is written: “Every adolescent knew the laws of impurity and purification,” which is the difference between egoistic reception and bestowal. In other words, their level corresponded to the connection of Bina and Malchut, called “a red heifer,” and they could understand to what the Torah refers.
The entire Torah is a description of the order of correction, an “instruction” (Oraa) on the correction of the soul.
From the Lesson on Weekly Torah Portion 6/27/2011