קדיש Class Forty Three. The end of Kaddish is really about Hashem. יתגדל ויתקדש שמי' רבה was originally said by simple people and then became a staple of our Tefilla. These two last lines deal primarily with peace. According to the צלותא דאברהם the idea of שלמא רבה מן שמייא isn't about peace but a form of greeting: as you leave the Shul or the Yeshiva, you are blessed to find him and be "greeted" by Him "out there" as well.