The anonymous british street artist Banksy made a hilarious piece on the side of a trash container in Notting Hill, that is highly relevant to happiness at work. The text is a parody of a La Fontaine fable and goes like this:

“Once upon a time there was a bear and a bee who lived in a wood and were the best of friends. All summer long the bee collected nectar from morning to night while the bear lay on his back basking in the long grass.

When Winter came the Bear realised he had nothing to eat and thought to himself ‘I hope that busy little Bee will share some of his honey with me’. But the Bee was nowhere to be found – he had died of a stress induced coronary disease”.

There’s a larger picture of it here.