In this second volume of the Zen series, Alberto Silva focuses on the reflection of the practice of sitting meditation: what does it mean to affirm that Zen constitutes an experience? What does it imply to approach it using a language that, without yielding to imprecision, claims, as a crucial specific quality, an experimental process? The thought of Zen is the result of a meditative practice. The great reformer of Japanese Buddhism, Eihei Dôgen, affirmed that «Zen is zazen». Likewise, the Zen sitting «Meditation» gathers the strong attributes of the experience constituting an unprecedented event - sometimes unthinkable -, capable of capturing the whole person and making them take the risk of a radical turn. Experience, body, space, time and language are the focus of this second volume in which Silva focuses on the reflection of the practice of sitting meditation and on the visible modifications that zazen produces on these foci: "clarification" (satori). ), "Liberation" (kensho), "awakening" (bodhi). However, it is the warmth of the practice, which always comes first, that sprout the right words to say what we call zazen: the event that occurs in the body and with the body.