Who said “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.”

“The three great elements of modern civilization, Gun powder, Printing, and the Protestant religion.”

“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.”

“Only the middle-aged have all their five senses in the keeping of their wits.”

“The only time you really live fully is from thirty to sixty. The young are slaves to dreams; the old servants of regrets. Only the middle-aged have all their five senses in the keeping of their wits.”