"On Effectiveness" by François Jullien is an in-depth non-fiction book that explores strategies for action in the fields of warfare, diplomacy, and rhetoric. The author demonstrates how to navigate difficult situations with ease and minimal effort. It explains how to optimally utilize potential situational energy and recognize favorable opportunities in a timely manner. Additionally, the book offers valuable insights on how to influence the opinions of others to one's advantage. This work is significant not only for those interested in philosophy and religion but also for anyone looking to enhance their communication skills and strategic thinking. It is an essential guide for anyone aiming to succeed in challenging situations.