"The cheerful man is also the wise man."

"Every pain is easy to despise, for the one who has considered it in its real limits."

"The greatest good is to be free from pain."

"Empty is the argument of the philosopher by which no human suffering is therapeutically treated. For just as there is no profit in medicine if it does not expel the diseases of the body, so there is n…"

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