O wise man, wash your hands of that friend who associates with your enemies

He who learns the rules of wisdom, without conforming to them in his life, is like a man who labored in his fields, but did not sow

Whoever has his foe at his mercy, and does not kill him, is his own enemy

A man is insensible to the relish of prosperity till he has tasted adversity

A scholar without diligence is a lover without money

Take care what you say before a wall, as you cannot tell who may be behind it