Speak so between two enemies that thou mayest not be put to shame if they become friends.

Between two men contention is like fire,
The ill-starred back-biter being the wood-carrier.
When both of them become friends again
He will among them be unhappy and ashamed.
To kindle fire between two men
Is not wise but is to burn oneself therein.
Converse in whispers with thy friends
Lest thy sanguinary foe may hear thee.
Take care of what thou sayest in front of a wall
Because an ear may be behind the wall.