Homo Deus: A Brief History of Tomorrow

by Yuval Noah Harari

However, humanism offered an alternative. As humans gained confidence in themselves, a new formula for attaining ethical knowledge appeared: Knowledge = Experiences × Sensitivity. If we wish to know the answer to any ethical question, we need to connect to our inner experiences, and observe them with the utmost sensitivity. In practice, that means that we seek knowledge by spending years collecting experiences, and sharpening our sensitivity so we could understand these experiences correctly. What exactly are ‘experiences’? They are not empirical data. An experience is not made of atoms, molecules, proteins or numbers. Rather, an experience is a subjective phenomenon that includes three main ingredients: sensations, emotions and thoughts. At any particular moment my experience comprises everything I sense (heat, pleasure, tension, etc.), every emotion I feel (love, fear, anger, etc.) and whatever thoughts arise in my mind. And what is ‘sensitivity’? It means two things. Firstly, paying attention to my sensations, emotions and thoughts. Secondly, allowing these sensations, emotions and thoughts to influence me. Granted, I shouldn’t allow every passing breeze to sweep me away. Yet I should be open to new experiences, and permit them to change my views, my behaviour and even my personality. Experiences and sensitivity build up one another in a never-ending cycle. I cannot experience anything if I have no sensitivity, and I cannot develop sensitivity unless I undergo a variety...