Every man carries two bags about him, one in front and one behind, and both are full of faults. The bag in front contains his neighbors' faults, the one behind his own. Hence it is that men do not see their own faults, but never fail to see those of others.
AesopIf these town gods can't detect the thieves who steal from their own temples, it's hardly likely they'll tell me who stole my spade.
Aesop