Observe your enemies, for they first find your faults.

Related:

• Observe your enemies, for they first find your faults.
  Greek...
• Eat and drink with your relatives; do business with strangers.
  Greek...
• Pay attention to your enemies.
  They are the first to discover your mistakes. --...
• Most of your faults are not your
  fault...
• Your enemies are
  closing in...
• First secure an independent income, then practice virtue.
  Greek...
• Smile.
  It pleases your friends and annoys your enemies...
• Sweep first before your own door, before you sweep the doorsteps of your neighbors.
  Swedish...