The light within all the luminaries that are called the preparations of the king, the Sfirot of the king, each one, that is, each light, shines and holds on to the light deep within, which is the light of infinity that is indefinable outwards, that is, it is inconceivable. For that reason, all amounts to one level and all is crowned with the same matter and is inseparable from each other, He and his name are one. He is the revealed light, called the king’s garment. The light deep within in all the lights is a concealed light, wherein lies that which is undefined and not revealed, which is blessed infinity.
What Lies Beneath the Surface of the Sefirot
Idra Zuta 1:77