"As a well-spent day brings happy sleep, so a life well spent brings happy death."

"The earth is not the center of the sun, but the sun is the center of the earth."

"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."

"Human subtlety will never devise an invention more beautiful, more simple or more direct than does nature, because in her inventions nothing is lacking and nothing is superfluous."

"Among the great things which are to be found among us, the Being of Nothingness is the greatest."