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2When it passes towards the east, the sun begins to have less effect upon it, and a thin line on the edge of its bright side emits its splendour towards the earth. This is on the second day: and thus, from day to day, advancing in its circuit, the third and fourth days are numbered: but, on the seventh day, when the sun is in the west, the moon is in the middle, between the east and the west; and being distant from the sun half the space of the heavens, the luminous half side will be towards the earth. Lastly; when the sun and the moon are the whole distance of the heavens from each other, and the former, passing towards the west, shines full on the moon behind it in the east, being the fourteenth day, it is then at the greatest distance from its rays, and the complete circle of the whole orb emits its light. In the remaining days it gradually decreases till the completion of the lunar month, and then returns to re-pass under the sun; its monthly rays being determined by the number of days.
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