“Cultivation of the mind is as necessary as food to the body”

“A mind without instruction can no more bear fruit than can a field, however fertile, without cultivation.”

“A room without books is like a body without a soul.”

“Diseases of the soul are more dangerous and more numerous than those of the body.”

“A happy life consists in tranquility of mind.”

“The face is a picture of the mind with the eyes as its interpreter.”

“For while we are enclosed in these confinements of the body, we perform as a kind of duty the heavy task of necessity; for the soul from heaven has been cast down from its dwelling on high and sunk, as it were, into the earth, a place just the opposite to godlike nature and eternity. But I believe that the immortal gods have sown souls in human bodies so there might exist beings to guard the world and after contemplating the order of heaven, might imitate it by their moderation and steadfastness in life.”