De Plantatione

Philo Judaeus

The works of Philo Judaeus, the contemporary of Josephus, volume 1. Yonge, C. D., translator. London: Henry G. Bohn, 1854.

And as this is the most ancient of all square numbers, it is found to exist in right angles, as the figure of a square in geometry shows. And right angles are manifest examples of correctness of reason. And right reason is an everlasting fountain of virtues.