738. This light is combined with the 207 worlds, which are hidden under that light, and it spreads in all of them. Below the concealed supernal Throne, WHICH IS BINAH, these 207 worlds dwell at that right side. There are 310, 207 on the right side and 103 from the left side, and together they equal 310. They are the ones that the Holy One, blessed be He, prepares constantly for the righteous, and from these spread many, many treasures of delight. They are all hidden for the righteous to delight with in the World to Come. Of this, it is written, "That I may cause those who love me to inherit substance (Heb. yesh, Yud-Shin); and I will fill their treasures" (Mishlei 8:21). About all these, it is written, "Neither has the eye seen, (that) an Elohim beside You... " (Yeshayah 64:3).

739. Yud-Shin (310) are the 310 worlds that are concealed under the World to Come, NAMELY UNDER BINAH. These 207 worlds, which are on the Right Side, are called ‘First Light’, because even the Light of the Left is called ‘light.’ IT IS A DIM LIGHT THAT PRODUCES NO OFFSPRING. SINCE THE LIGHT OF THE RIGHT, WHICH IS CHESED, PRECEDES THE LIGHT OF THE LEFT. But the First Light will produce offspring in the World to Come. And if you say that this is true only for the World to Come, WHICH IS BINAH, and no more, yet it produces offspring every single day, MEANING EVEN FOR THE LEVELS OF ZEIR ANPIN THAT IS CALLED ‘DAY.’ For if this light would not be IN ZEIR ANPIN, then the world, WHICH IS MALCHUT, would not be able to exist, as it is written, “For I have said, the world is built by love (chesed)” (Tehilim 89:3), MEANING WITH THE FIRST LIGHT THAT IS CALLED ‘CHESED.’