"O philosophy, life's guide! O searcher-out of virtue and expeller of vices! What could we and every age of men have been without thee? Thou hast produced cities; thou hast called men scattered about into the social enjoyment of life."
"A room without books is like a body without a soul."
"While there's life, there's hope."
"To study philosophy is nothing but to prepare one’s self to die."
"Friendship improves happiness and abates misery, by the doubling of our joy and the dividing of our grief."
"When you wish to instruct, be brief; that men's [children's] minds take in quickly what you say, learn its lesson, and retain it faithfully. Every word that is unnecessary only pours over the side of a brimming mind."