Emblem 9 from Pandora

A teacher or philosopher sits in a hall with four columns. He holds a book open upon his knee, for five pupils to examine. On the left page of the open book is depicted a crescent and a full Moon above two dragons forming the ouroboros, the upper one being winged (as in emblems 2 and 3 of this sequence). On the right page are two Suns depicted over a sun face set in a larger circle. In the air above the philosopher, seven birds with bows in their claws, aim arrows at him.