"We must not violate nature, but obey her."

"It is not possible to dispel the fear of the most important things unless one understands the whole nature of the universe."

"Remember that you were born with two ears and one tongue, so that you may listen more and speak less."

"The acquisition of riches has been for many men not an end, but a change, of troubles."

"The wise man avoids pain, but does not seek pleasure."