Saadi

To tell a falsehood is like the cut of a saber; for though the wound may heal, the scar of it will remain.

The beloved of the Almighty are the rich who have the humility of the poor, and the poor who have the magnanimity of the rich.

A wise man among the ignorant is as a beautiful girl in the company of blind men.

Whoever acquires knowledge and does not practice it resembles him who ploughs his land and leaves it unsown.