In the fourth class, it is highlighted that Kabbalah is a universal language that acts as a map to explore the inner world. It is mentioned that it has been protected by groups throughout history and is presented according to different cultures and languages. The concept of the Tree of Life is introduced as a symbolic representation, and the importance of not interpreting it literally is emphasized. The participants are invited to practice silence and reflect on how to access primordial knowledge. The next class will delve deeper into the Tree of Life.

In summary, Kabbalah is explored as a universal language, and concepts such as primordial knowledge, the ten emanations, and the Tree of Life are introduced.