This podcast episode explores the paradox of happiness and the stability of happiness levels across countries and individuals. It delves into the concept of psychological adaptation, the existence of a control system for maintaining stability in happiness levels, and the evolutionary reasons behind mood modulation. The episode also discusses the unconscious mood-lowering system and the impact of external circumstances on happiness. It challenges the idea that our outer lives determine our well-being and emphasizes the complexity of human experiences and the unreliability of memory. The episode concludes with a discussion on regrets, wisdom, and the evolving nature of beliefs and values.