If 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.
If you are wise you won't be deceived by the innocent airs of those whom you have once found to be dangerous.
Distrust interested advice.
We hang the petty thieves and appoint the great ones to public office.
Wise men say nothing in dangerous times
Persuasion is often more effectual than force.