"The painter who draws merely by practice and by eye, without any reason, is like a mirror which copies everything placed in front of it without understanding."

"The greatest good is that which is chosen in preference to all others."

"Just as a well-filled day brings blessed sleep, so a well-employed life brings a blessed death."

"The human foot is a masterpiece of engineering and a work of art."

"It is an easy thing to praise and blame, but not so easy to know what to praise and what to blame."