But in time to come, when the hidden beginning I mentioned [Keter] is revealed, the happiness will be far, far greater, and it will never cease. All things emanate from their source. Likewise, all the rules governing the lights and their functioning, whether in motion or at rest, follow their source. Any change in the source from which the lights receive affects the whole world. For this reason, in time to come the world will undergo many changes, and the Holy Temple will certainly be different since this is the place from which life is channeled to all the creatures in all the worlds.
The First Temple, then, corresponds to Chochmah, the Wisdom that was given to Solomon and with which he built the Temple, as I have explained, while the future Temple corresponds to the hidden beginning [Keter] that has yet to be revealed.
Nevertheless, there is certainly nothing new under the sun. All the changes and developments that have taken place and continue to take place every single day for the six thousand years of creation were decreed at the very outset. Even so, in time to come, when the boundaries of Chochmah are surpassed, the world will enter a new state of joy. This is a great fundamental, though I will not discuss it at length now. Let me just say briefly that initially God made all things the way they are now on the basis of Chochmah alone, yet they contain within them the power to be ordered according to the supreme beginning [Keter]. And when this beginning is revealed, everything will be drawn after it through the original power already planted within them at the outset. The entire creation will then be renewed as if it was born at that moment. That is why Isaiah spoke of: “The new heavens and the new earth” (Isaiah 66:22).
— Chaim Luzzatto “The Secrets of the Future Temple”