The book continues the “School of Self-Knowledge” series and is the first volume of the three-volume Purification series. “I want to understand how to know myself through purification. I look at what appears to me as purification, and I understand: purification is some kind of mystery that is not solved at the beginning of purification. Perhaps the answer comes only when the purification is completed. From a philosophical point of view, this is as it should be: you can only give a clear definition of a concept by completing it. But if this concept is exclusively human, that is, mine, then it can only be defined by completing itself. Having completed cleansing yourself of everything that is unclean. Having achieved perfection. But if I am the creator of impurity and purity in this world, then the concept of purification completely coincides with self-knowledge. After all, you can finally know yourself only by separating the last non-I, the last impurity of your self. This is the initial hypothesis of my research...”Cleansing has now become a common concept, everyone does it one way or another. But what are we cleaning? Limitation? Psyche? Body? Consciousness? And what should you cleanse if you want to know yourself? It turns out that answering these questions is not easy...