“Quo usque tandem abutere, Catalina, patientia nostra?”

“Sed nescio quo modo nihil tam absurde dici potest quod non dicatur ab aliquo philosphorum. (There is nothing so absurd but some philosopher has said it.)”

“Everyone has the obligation to ponder well his own specific traits of character. He must also regulate them adequately and not wonder whether someone else's traits might suit him better. The more definitely his own a man's character is, the better it fits him.”

“Friendship improves happiness, and abates misery, by doubling our joys, and dividing our grief”

“A room without books is like a body without a soul.”

“To study philosophy is nothing but to prepare one’s self to die.”

“To be ignorant of what occurred before you were born is to remain always a child. For what is the worth of human life, unless it is woven into the life of our ancestors by the records of history?”