In the midst of all dwells the sun.

There may be babblers, wholly ignorant of mathematics, who dare to condemn my hypothesis, upon the authority of some part of the Bible twisted to suit their purpose. I value them not, and scorn their unfounded judgment.

Pouring forth its seas everywhere, then, the ocean envelops the earth and fills its deeper chasms.

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.

For a traveler going from any place toward the north, that pole of the daily rotation gradually climbs higher, while the opposite pole drops down an equal amount.

Of all things visible, the highest is the heaven of the fixed stars.

At rest, however, in the middle of everything is the sun.