Only the most brave people are capable of having a successful startup. It does not matter how smart you are, or how brilliant your ideas are, if you don't have an incredible amount of sheer resilience or bravery, you will never be able to make something out of your startup. That said, once you have started this journey, you can never turn back. Being an entrepreneur becomes your whole personality, not to mention that it is also your whole life. You have to work endlessly to make your idea becom…