One must understand the universe to recognize oneself. In this comprehensive book by American psychologist and physicist Arnold Mindell, fundamental modern insights from physics and depth psychology are related to the traditional wisdom of humanity across different cultures and explained in summary. The objective, sensibly perceivable, mathematically and physically measurable world and corresponding thinking are complemented and deepened by quantum research, incorporating the psychological states of observers, their non-local, non-temporal sensing experiences, intuition, and dreams, which are mathematically described. Vivid examples, experimental exercises, and illustrations, along with manageable chapters and simplified language, make the presentations accessible even to laypeople. Those who are prepared for the ongoing paradigm shift will find valuable insights in this work.