Nicolaus Copernicus

For it is the duty of an astronomer to compose the history of the celestial…

Not a few other very eminent and scholarly men made the same request, urging that…

So, influenced by these advisors and this hope, I have at length allowed my friends…

To know that we know what we know, and to know that we do not…

I am aware that a philosopher’s ideas are not subject to the judgment of ordinary…

So far as hypotheses are concerned, let no one expect anything certain from astronomy, which…

Although all the good arts serve to draw man’s mind away from vices and lead…

Therefore, when I considered this carefully, the contempt which I had to fear because of…