Pay attention to your enemies for they are the first to discover your >>
Serve your enemies for they first find out your faults >>
As iron is eaten away by rust, so the envious are consumed by their ow >>
A person is his own worst enemy. >>
One reason we should love our enemies is that we made them ourselves. >>
Speak well of your enemies... you made them. >>
Observe your enemies, for they first find out your faults.