Contentment is a wealth that is never exhausted

Be afraid of a dignified man when he is hungry and a wicked man when his belly is full.

Know thyself, and thou shalt know God.

Perfecting one's intellect causes one to speak less, and those words spoken will be adorned with wisdom.

Be like a flower that gives its fragrance even to the hand that crushed it.

Knowledge is of two kinds: that which is absorbed and that which is heard. And that which is heard does not profit if it is not absorbed.

He who busies himself with things other than improvement of his own self becomes perplexed in darkness and entangled in ruin. His evil spirits immerse him deep in vices and make his bad actions seem handsome.