"There are three classes of people: those who see, those who see when they are shown, those who do not see."

"He who wishes to be rich in a day will be hanged in a year."

"To develop a complete mind: Study the art of science; Study the science of art. Learn how to see. Realize that everything connects to everything else."

"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."

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