Saadi

"The bird alighteth not on the spread net when it beholds another bird in the snare. Take warning by the misfortunes of others, that others may not take example from you."

"The bad fortune of the good turns their faces up to heaven; the good fortune of the bad bows their heads down to the earth."

"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."

"An enemy to whom you show kindness becomes your friend, excepting lust, the indulgence of which increases its enmity."