(30) And in periods of seven days the moon undergoes its changes. In the first week she becomes half moon; in the second, full moon; and in the third, in her wane, again half moon; and in the fourth she disappears. Further, as Seleucus the mathematician lays down, she has seven phases. First, from being invisible she becomes crescent-shaped, then half moon, then gibbous and full; and in her wane again gibbous, and in like manner half moon and crescent-shaped.

(104) Morning and evening are and reach up from the earth to the moon only, and take their original from the light of the sun, and this makes evening and morning, as also the outward day, and the outward dark night, as every one knoweth.

(3) It rises and it sets, by turns, throughout its limbs ; so that by reason of Time’s changes it often rises with the very limbs with which it [once] had set. For [its] sphericity,—its law of revolution, —is of this nature, that all things are so straitly joined to their own selves, that no one knoweth what is the beginning of their revolution ; since they appear for ever all to go before and follow after their own selves. Good and bad issues, [therefore,] are commingled in all cosmic things.