Rabison Shumba writes that greatness is dependent on you as an individual. It takes individual readiness, effort, and decision to start walking in the direction of destiny. You are born into a world that is focused on limits. For example, you can only earn so much salary, you can only work so many hours, you can only manage so many projects at a time, and so on. Until you make a decision to build the internal capacity to make an impact on humanity, you will always grapple with limitations and barriers.
Read more of what Rabison has to say: http://informationanthology.net/CareerMentor/Achieve-Your-Greatness.html.