Praeparatio Evangelica (The Preparation of the Gospel)

'ANAXIMANDER: it has light of its own, but somewhat scanty.

'Antiphon: the Moon shines by its own light; but the portion of it which is partially hidden is obscured by the Sun's light falling upon it, as it is the nature of the stronger fire to obscure the weaker: which happens also with the other heavenly bodies.

'Thales and his followers: the Moon is illumined from the Sun.

'Heracleitus: the Sun and Moon are affected in the same way: for the heavenly bodies being boat-like in shape, and receiving the products of the watery evaporation, become luminous in appearance; the Sun more brilliantly, because it moves in a purer atmosphere, but the Moon moving in a turbid atmosphere therefore also appears more dim.'