In other words, the light descends with great power all the way down to the bottom. When a given light has to make one or several levels, it descends faultlessly and without hindrance but rather with great power. It then ascends again, leaving behind what it leaves (i.e. a trace – reshimu – of its radiation, namely the level that remains there below). This is because what descends is the actual light of Eyn Sof, blessed be He, for all the lights emerge from Him. Since they remain there in their place (after the ascent of this great light), the individual limited light suited to that level takes on its own existence. When the great light ascends to return to its source, this part remains. This is what creates the bond connecting the lights themselves with their source.