It would be interesting to know the context. I see this as a way to balance the "any kid can be president" and graduation speeches with "the world is yours" type of flattery. Basically your opinion about your abilities and the strength of your will power doesn't always matter. On one hand, with enough drive a person can make incredible achievements. On the other, there will be situations that are simply beyond a person's intellectual and physical capabilities. We also all run into the fact that time and money are also limited quantities, and we're are all shaped by factors such as birth, education, and quite often, simple luck of being at the right place at the right time. Sometimes a seemingly less qualified person will succeed where others have failed, or a person will create an invention at the exact time that it will be adopted by society.