The Preparation lesson was prefaced with, “Inner preparation before a lesson amplifies its effect”. I’m not sure it was covered directly in the video, though there were other topics like ones destiny. What is the preparation specifically?
Based on the “The Essence…” clips, it sounds like Kabbalah focuses on work on the ego to bring about understanding through inner experience. It’s in contrast to meditation, which focuses on suppressing the ego. It’s also in contrast to religions’ focus on belief.