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.

Never explain yourself to anyone, because the one who likes you would not need it, and the one dislikes you wouldn't believe it.

A man's behavior is the index of the man, and his discourse is the index of his understanding.

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.

Many a spoken word is more piercing than an attack.

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.