For it is the duty of an astronomer to compose the history of the celestial motions through careful and expert study. – Nicolaus Copernicus
So, influenced by these advisors and this hope, I have at length allowed my friends to publish the work, as they had long besought me to do. – Nicolaus Copernicus
Therefore, when I considered this carefully, the contempt which I had to fear because of the novelty and apparent absurdity of my view, nearly induced me to abandon utterly the work I had begun. – Nicolaus Copernicus
So far as hypotheses are concerned, let no one expect anything certain from astronomy, which cannot furnish it, lest he accept as the truth ideas conceived for another purpose, and depart from this study a greater fool than when he entered it. – Nicolaus Copernicus