How the evolution of the senses led humans to ask the question "what is the meaning of life"?Dr. Yves Sauvé approaches a fundamental question in a thought provoking, compassionate and poetic fashion, based on scientific facts. What is the meaning of life? He invites us to ponder why we can actually ask this very question. We are taken on a journey of how our brain creates the reality we experience, and how our senses evolved from single cells. Between sensing (input) and acting (motor output), neurons interposed themselves to ultimately generate predictive mental models of the physical aspects of reality, which determined species survival and passage of genetic information over 3.8 billion years. We are here because our ancestors were threat detectors, allowing them to survive until being able to pass on genetic information.Brains, such as ours, evolved to a point at which mental models could be generated without any sensory input and motor outputs. Humans can model a reality and fear threats without any sensory inputs and motor outputs. We can ruminate endlessly.Dr. Sauvé puts forward that the lack of sensory awareness of the cellular activity that generates predictive mental models creates a void, and becomes a threat itself. Where do our thoughts come from, we cannot feel them being generated?He proposes that our potential to experience happiness is as infinite as our willingness to connect with our senses mindfully, letting thoughts be thoughts.Between sensors and effectors, the in-between becomes sense, trying to make sense, compelled to make sense. Let go, breathe, come back to your senses.