Answer: Indeed, if our world is not connected to the upper world in any way, how can I do something through my physical actions, through my egoism?
The point is there is nothing I can do. However, we have been given the opportunity to gather in tens and try to unite between us despite our egoism, above it. And although I cannot do that at all, to the extent that I try to connect with the friends, I invoke the upper light unto me. That is, there is a so-called branch-to-root connection, and I can do it.
If I behave in a certain way with the friends in the group and we study Kabbalistic sources together, create connections between us, and imitate the images and actions Kabbalah writes about, then even if I am in my egoism, I still feel an internal inspiration to summon the impact of the upper surrounding light unto me.
This light surrounds the ego on purpose, and to the extent that the ego yearns for it and seemingly wants to resemble it, the light impacts the ego and changes it.
From KabTV’s “Fundamentals of Kabbalah” 12/23/18