It is a manifestation of the infinite mercy of the Holy One, Blessed be He, that He set the route of salvation to depend on the recitation of Kaddish by the mourners: “Yisgadal — exalted and hallowed be His great Name.” It is this prayer which causes the loftiest ascent in the soul.

It is interesting to note that there are other areas in which the association of the mundane with the sublime adds strength to the sublime. Philosophically this symbiosis finds its source in Torah and mitzvos and it is included in the order of the devolvement of the worlds. The Al‑mighty, G‑d Himself, uses this pattern:

For so said the High and Exalted One, who dwells to eternity, and His name is Holy: “With the lofty and the holy ones I dwell, and with the crushed and humble in spirit, to revive the spirit of the humble and to revive the heart of the crushed1.”

Who can revive “the spirit of the humble”? only “the High and Exalted One” who dwells “with the lofty and holy ones.” The same principle applies in the case of Kaddish, in order to save the soul of the lowly Jew (the spirit of the humble) the Kaddish must be invoked: “Exalted and hallowed be His great Name!”