How much can you know?
>Knowledge is power.
This meme is dead.
True power is application of knowledge.
>Exercising your will through application of knowledge you have, is thus, true power or simply power.
Observe that there are two components to achieve power. First is to accquire the knowledge and then exercise it. This is very abstract recurssive idea.
For instance in low order of influence on whole world, you accquire knowledge to do algebra, your exercise the skills earned "to pass your exams."
Another instace for high order influence on world, you accquire knowledge to manufacture cement, you exercise the skills earned "to sell cement; the buyer build house; provide shelter for his family"

As you can see different way of Accquiring Knowledge and Exercising it have different impact on world.

Now imagine your are 24 out of college, after having first day of your job, you come back and think about what mentioned above.

What do you want to do?
Most of us would say, "accquire more knowledge and exercise more to influcence the world more."

But you have time constraint. You can die anythig and there is a default timer for death when you get old.