In the midst of all dwells the sun.

The Universe, wrought for us by a supremely good and orderly Creator.

More stars in the north are seen not to set, while in the south certain stars are no longer seen to rise.

Perhaps there will be prattlers who, although completely ignorant of mathematics, nevertheless take it upon themselves to pass judgment on mathematical questions, and on account of some passage in Scripture, badly distorted to their purpose, will dare to censure and assail what I have presented here.

The strongest affection and utmost zeal should, I think, promote the studies concerned with the most beautiful objects, most deserving to be known.

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.

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.