"The truly wise man is he who does not grieve for what he has not, but rejoices in what he has."

"Death is nothing to us; for that which is dissolved is without sensation, and that which lacks sensation is nothing to us."

"The man who says that all things are not possible to him is a fool."

"The wise man counts it a greater advantage to be content with little than to be rich."

"The study of nature creates men who are not only free from fear, but also from vanity."