Education is a progressive discovery of our own ignorance. - Will Durant

"To say nothing, especially when speaking, is half the art of diplomacy."

"The trouble with most people is that they think with their hopes or fears or wishes rather than with their minds."

"Civilization exists by geological consent, subject to change without notice."

"The love we have in our youth is superficial compared to the love that an old man has for his old wife."

"Every science begins as philosophy and ends as art; it arises in hypothesis and flows into achievement."