Mistrust bad men as you would trust the good

Consider that you owe it to yourself no less to mistrust bad men than to put your trust in the good.  Isocrates.  To Demonicus.  Speech 1.  Section 21.

Garden Statue of a Satyr from the House of the Centenary in Pompeii Roman 1st century CE Bronze
Photographed at Pompeii: The Exhibit at the Pacific Science Center in Seattle, Washington.