Most people, he suggested, sleepwalk through life, never asking themselves what they’re doing or why they’re doing it. They absorb the values and beliefs of their parents, or their culture, and accept them unquestioningly. But if they happen to absorb wrong beliefs, it will make them sick. Socrates insisted there’s a strong connection between your philosophy (how you interpret the world, what you think is important in life) and your mental and physical health.

