## A quotation by Nicolaus Copernicus

*Mathemata mathematicis scribuntur*

Mathematics is written for mathematicians

*De Revolutionibus*

If there should chance to be any mathematicians who, ignorant in mathematics yet pretending to skill in that science, should dare, upon the authority of some passage of Scripture wrested to their purpose, to condemn and censure my hypothesis, I value them not, and scorn their inconsiderate judgement.

*De Revolutionibus Coelestibus*

Finally we shall place the Sun himself at the center of the Universe. All this is suggested by the systematic procession of events and the harmony of the whole Universe, if only we face the facts, as they say, 'with both eyes open'.