"It is fitting for a person to direct his thoughts towards what is good and beautiful and to avoid what is ugly and shameful."

"The physician must be able to discern the state of health of a person from his speech, his gait, his sleep, his dreams, his appetite, his thirst, his excretions, and his thoughts."

"The greatest love is the love of God, and the greatest fear is the fear of God."

"Do not consider it proof just because it is written in books, for a liar who will deceive with his tongue will not hesitate to do the same with his pen."

"There is no more excellent quality for man than humility."