I particularly like what I am reading:

"A common belief is that knowledge is power. It's not.

Knowledge is ubiquitous in the Internet Age and thus grants no special privileges, no unique power.

Certainly we need to have knowledge and stay current. But the real power comes from what we do with knowledge.

In other words, in the 21st century power comes from our ability to think... "

~ Michael Durr, author of 'My Brain, My Future';

To me, the best way to describe it is that knowledge is not measured by what's stored in your headspace; it's always defined by your productivity, i.e. what you do and what you don't do!