Most students don't realize the extent to which their grades are influences by accidental happenings. Without the right breaks one cannot be an effective leader. Capable people who fail to become leaders have not taken advantage of their opportunities. No matter how hard you try some people just don't like you. People who can't get others to like them don't understand how to get along with others.
Heredity plays the major role in determining one's personality.
It is one's experiences in life which determine they're like. I have often found that what is going to happen will happen. Trusting to fate has never turned out as well for me as making a decision to take a definite course of action. In the case of the well prepared student there is rarely if ever such a thing as an unfair test. Becoming a success is a matter of hard work, luck has little or nothing to do with it.