"Lies are the greatest murder. They kill the Truth."

"I cannot teach anybody anything. I can only make them think."

"The hour of departure has arrived, and we go our separate ways, I to die, and you to live. Which of these two is better only God knows."

"For I do nothing but go about persuading you all, old and young alike, not to take thought for your persons and your properties, but first and chiefly to care about the greatest improvement of the sou…"

"I know that I know nothing."