Who said “The three great elements of modern civilization, Gun powder, Printing, and the…”?

“Every new generation...is a fresh invasion of savages.”

“All civilization has from time to time become a thin crust over a volcano of revolution.”

“One might enumerate the items of high civilization, as it exists in other countries, which are absent from the texture of American life, until it should become a wonder to know what was left.”

“If Germany, thanks to Hitler and his successors, were to enslave the European nations and destroy most of the treasures of their past, future historians would certainly pronounce that she had civilized Europe.”

“People sometimes tell me that they prefer barbarism to civilization. I doubt if they have given it a long enough trial. Like the people of Alexandria, they are bored by civilization; but all the evidence suggests that the boredom of barbarism is infinitely greater.”

“Wonder is the basis of worship.”

“Every noble work is at first impossible.”

“A fair day's wages for a fair day's work.”

“Speech is of time, silence is of eternity.”

“The fearful unbelief is unbelief in yourself.”

“Clever men are good, but they are not the best.”