The book is a dialogue to analyse what constitute destructive Emotions. What triggers any emotions at all. And if there's a way to better understand and control destructive Emotions. Its a dialogue between bhuddist school of thought ( in a secular way) and western school of thought ( mostly neurology).
Dalai lama ( and other bhuddists) understanding of emotions is surprisingly simple and powerful.
Western psychology ( broad generalisation) focuses too little on generating awareness of emotions and understanding of emotions. It focuses more on external causes which caused the Emotional disturbance and then try to resolve them. Bhuddists come with a very clear distinction between reality as-is ( phenomenology) and our interpretation of reality. It then attempts to control our interpretation of reality by rationalising the thoughts.
From neurology point of view, the book highlights how certain part of brains are more lit on different emotions. There's no solutions though as neurology sits more on the symptom analysis side.
Book also touches on bhuddists understanding of self and western interpretation of self. Then it touches on impact of culture on our interpretation of self.
Its a brilliant read, full of wise contrasts from multiple school of thoughts.
The only negative I felt in the book was its writing style. Since it was a logical discussion, it's not easy to give it topical coherence.