
During the whole time the moon is getting brighter, it collects light for itself when it is directly opposite the sun. This takes fourteen days, and by then, its light is fully bright in the sky. When it is completely illuminated, its light is at its fullest in the sky.
During all the period during which the moon is growing in her light, she is transferring it to herself when opposite to the sun during fourteen days [her light is accomplished in the heaven], and when she is illumined throughout, her light is accomplished full in the heaven.