The Danger in Knowledge By John Leonard Knowledge is an interesting concept. As, we KNOW the facts. That's the preferred definition.
Lets look at perceive.
To become aware of. So, to KNOW something is to perceive it with Certainty. And, to perceive it is to feel, hold, grasp it, recognize it. Limited by looking through a microscope at the cells of a whale. Limited by standing in Manhattan, and looking at the Statue of Liberty.