Ignorance is bliss. That's how I took it when I used to read biographies of great human beings, where in most of the cases, people always used to ignore them at the first place until any great invention took place and they were the hero behind it. That’s when I categorized people into two divisions: (a). people who live to make a difference, great and creative people like scientists, programmers or artists and people of this type; (b). people who just live their life typically and rely upon other