Truth is the daughter of time, and I feel no shame in being her midwife.

Planets move in ellipses with the Sun at one focus.

The Earth is round, and is inhabited on all sides, is insignificantly small, and is borne through the stars.

If God himself has waited six thousand years for someone to contemplate his works, my book can wait for a hundred.

Repudiating the sensible world, which he neither sees himself nor believes from those who have, the Peripatetic joins combat by childish quibbling in a world on paper, and denies the Sun shines because he himself is blind.

A most unfailing experience... of the excitement of sublunary (that is, human) natures by the conjunctions and aspects of the planets has instructed and compelled my unwilling belief.

Geometry is one and eternal shining in the mind of God