Aesop's Fables: the Wolf and the Shepherd

A Wolf, lurking near the Shepherd's hut, saw the Shepherd and his family feasting on a roasted lamb.

"Aha!" he muttered. "What a great shouting and running about there would have been, had they caught me at just the very thing they are doing with so much enjoyment!" 

Men often condemn others for what they see no wrong in doing themselves.

(The Aesop for Children With pictures by Milo Winter, 1919, p.80)