People who are written about in biographies share two things in common. First, they are obsessed. Arnold Schwarzenegger, Mahatma Gandhi, Richard Branson, Steve Jobs… They could behave like jerks and moral deviants. But I repeat – they were all obsessed.

John Carmack was obsessed with graphics engines. The Wright brothers were obsessed with flying. Leonardo da Vinci was obsessed with the structure of things. That’s why they created, respectively, graphics engines, flying machines, and inventions. Yes, of course, they thought about what they were doing. I’m talking about meta-thinking. Carmack published his plans, the Wright brothers constantly published their thoughts on their experiments, and Leonardo is known for his incredible sketches. But they DIDN’T write books on how to publish plans, how to describe experiments, or what to sketch in a notebook. They did their damn work! And this is the second thing they all have in common.

The same applies nowadays – anyone who aims to teach you investments should primarily be engaged in investing. Why do we need a Leonardo who teaches how to keep an invention diary?