In life, you need to have a goal. How to achieve your goal? You have to take action with a deep understanding of how reality works. Your brain needs to have a map of reality. To create this mental map, you need to do the damn thing. This will create neural links. Then, you have to calibrate your mental map with reality. How? By constantly reflecting on what is true, what went wrong , what went right, then figure out the root cause and design a plan on how to do it differently in the future. If you mental map is different from reality, your action will not be optimal. ie. You have the wrong belief. You need to have a deep understanding of how reality works. To get there, You can learn from others (including books and in-person) You can learn by yourself (through your own experience or reasoning) Learning by yourself can be slow. However, it will be a source of tremendous value because you reason from first principles. First principles are the basic truth, then you figure