Nicolaus Copernicus — "To know that we know what we know, and to know that we do not know what we do no…"
To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.
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More from Nicolaus Copernicus
"Thus, the sun, although it is the center of the world, is not the center of the universe."
"And so, having obtained the opportunity, I now propose to explain the motions of the heavenly bodies, and the order of the universe, with greater certainty than has hitherto been possible."
"For the motion of the earth is a fact, and the apparent change of position of the fixed stars is due to the earth's motion and not to any motion of the stars themselves."
"For I am not so enamored of my own opinions that I would disregard what others may think of them."
"I am aware that I have made myself liable to be laughed at by those who consider it an absurdity to suppose that the earth moves."
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