Answer: It is very simple. A Kabbalist understands his deficiencies and the deficiencies of other people, he understands everything that is portrayed as a burden on them and on him; so he forgives people.
A Kabbalist sees his own reflection in everything that is found outside of him, which are the inanimate, vegetative, animate, and human. These are the four levels of his egoism, which are portrayed in front of him.
From the Kabbalah Lesson in Russian 2/21/16