The wish for demonstrating your value to other people is a perennial motivation for living.
It has good reasons. For the effort of living among other people implies a sort of struggle for imposing yourself to them.
However, it is founded on a lie. Nobody expects someone to demonstrate his or her value. The value of an individual rather strikes other people unexpectedly. In order to find a way to deal with such a strike, the people decide for considering it as a cause of public praise or blame.
Therefore, the demonstration of your value should be modified in order to borrow much from the violence of a strike and not to be like a peaceful reasoning. Also, it should be accepted that what you finally demonstrate about yourself is the power of striking other people and not your own value which can be appreciated only by a few.