Every human being has a life management system. A component of a life system is Theory. The quality of a theory where one’s life system is founded can be judged by objective and subjective criteria.
However, in my opinion, a good theory should ultimately help you to build a life management system that helps you take intentional action and, perhaps even more important, build a life management system that helps you be decisive. Remember, a life management system should free your mind.
No matter how accurate and complex your theory is, if it doesn’t help you achieve what you want to achieve, it is useless. practice is the ultimate test of knowledge.