The Voice did not sound offended. “You are easy to explain - even to you. You may call yourself a soul if that pleases you, but what you are is a nexus of electromagnetic forces, so arranged that all the interconnections and interrelationships are exactly imitative of those of your brain in your Universe-existence - down to the smallest detail. Therefore you have your capacity for thought, your memories, your personality. It still seems to you that you are you.”
— Isaac Asimov, The Last Answer