To know that we know what we know, and to know that we do no... - Nicodemus Copernicus

"To know that we know what we know, and to know that we do not know what we do not know, is true knowledge."

Nicodemus Copernicus Knowledge

Canon Mathematician Astronomer Polish-German 1473–1543

More from Nicodemus Copernicus

"Astronomy is written for those who look at the heavens."

"The Universe is a great living body, of which we are insignificant parts."

"I am not so enamored of my own opinions that I disregard what others think."

"Contempt precedes opinion."

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."