The last of the 156 chapters of theFour Treatises, which is presented here, is a fitting conclusion to this poetic root text of Tibetan medicine said to date back to the twelfth century. It is not called “Conclusion” (as the chapter before it), however. Instead, it is titled “Entrustment,”¹ and it begins with a fundamental question of doubt. The following question prob ably arises in the mind of any medical practitioner at some point:What is the purpose of possessing the knowledge of healing and being a physician if treatments can fail and people still die? This core question of