The fundamental principle of making money is creating value, not selling time. The fundamental principle of creating value is solving problems, not providing labor. The fundamental principle of solving problems is identifying true needs, not self-sentiment. The first principle of identifying true needs is practical feedback, not working behind closed doors. The first principle of practical feedback is rapid iteration, not meticulous polishing. The first principle of rapid iteration is validating the model, not just delivering. The first principle of validating the model is system replication, not individual hard work. The first principle of system replication is leverage thinking, not linear accumulation.