Greek proverb: Ἀλωπελίζειν

Here's a saying from Apostolius, C2.30, with a Latin version from Clavis Homerica. The image is from Harlequeen at Flickr. Here are some more Apostolius proverbs.

Ἀλωπελίζειν πρὸς ἑτέραν ἀλώπεκα.
Cum vulpe vulpinari.
With the fox, be a fox.