I went with power is power, because only those with true power seem to know what it is, when you have it, you'll know, money isn't power, money is a control mechanism to give your peasants something to strive for without ever letting them know that it isn't the be all end all...
Knowledge isn't power if you don't have the intellect to back it up, a lot of stupid people know a lot of stuff, but they'll never figure out how to use it.
Power is the understanding and the cunning required to control others, to influence the masses and control those who are in charge of them, people in government aren't powerful, neither are rich people... I've known a degree of power, that time is over... got boring y'know