Well .... I'm a scientifical mind ninja genius ... So I'VE GOT THE POWER ... BAM ! ;)
Knowledge can start a war or stop it. Start a powerful protest in response to an Injustice.
More on the concept:
"Knowledge is power. Information is liberating. Education is the premise of progress, in every society, in every family." Kofi Annan
Knowledge = Options = Power
The control of information is something the elite always does, particularly in a despotic form of government. Information, knowledge, is power. If you can control information, you can control people. Tom Clancy
Watch any MacGyver episode and you will know.
Knowlede is power because you need knowledge to get or use power. For example, if you suddenly got magic powers, but no knowledge on how to use them, then you would be powerless
Information is liberating.
There is really nothing like having knowledge and differentiating between knowledge and belief . . . Now having said that, there is no reason to apply religious connotations to this statement . . It literally can be applied to most things in life.
All knowledge is learning
The pursuit of Knowledge is a lifelong activity. I guess you could reach a point of being powerful on account of what you know and hopefully you will be able to use it wisely.
This an article about Lifelong Learning that helped me a lot on the subject.