Answer: A Kabbalist thinks about himself more than everyone else because he associates himself with the whole world. By relating to himself as an inseparable part of creation, he thinks about all of humanity; he has immense desires, immense intentions, and immense demands.
All of this is expressed very strongly within him, but not with an egoistic inclination as in our world. Therefore, he has more concerns than any other person.
A Kabbalist thinks about how to bring all the souls into one system, into one single form. This is his permanent inner work. But it is not expressed in any form externally. Only other Kabbalists can feel it.
From the Kabbalah Lesson in Russian 3/12/17