“We are passing through a period of great commercial prosperity, and such a period is as sure as adversity itself to bring mutterings of discontent.”

"1777 Variables in the Magellanic Clouds" http://books.google.com/books?id=UkdWAAAAYAAJ&pg=PA87 (1908) Annals of the Astronomical Observatory of Harvard College Vol.60. No.4

quoted in "The Hand on the Lever" http://www.newyorker.com/magazine/2014/07/21/the-hand-on-the-lever in The New Yorker (July 21, 2014) by Nicholas Lemann
2010s

1940s, Fourth Inaugural Address (1945)
Context: We Americans of today, together with our allies, are passing through a period of supreme test. It is a test of our courage — of our resolve — of our wisdom — our essential democracy. If we meet that test — successfully and honorably — we shall perform a service of historic importance which men and women and children will honor throughout all time. As I stand here today, having taken the solemn oath of office in the presence of my fellow countrymen — in the presence of our God — I know that it is America's purpose that we shall not fail.

XXXI.
Panegyricus

"Jerusalem", Ch. 20, p. 265
Report to Greco (1965)
Context: How can anyone have a true sense of the Hebrew race without crossing this terrifying desert, without experiencing it? For three interminable days we crossed it on our camels. Your throat sizzles from thirst, your head reels, your mind spins about as serpent-like you follow the sleek tortuous ravine. When a race is forged for two score years in this kiln, how can such a race die? I rejoiced at seeing the terrible stones where the Hebrews' virtues were born: their perseverance, will power, obstinacy, endurance, and above all, a God flesh of their flesh, flame of their flame, to whom they cried, "Feed us! Kill our enemies! Lead us to the Promised Land!"
To this desert the Jews owe their continued survival and the fact that by means of their virtues and vices they dominate the world. Today, in the unstable period of wrath, vengeance, and violence through which we are passing, the Jews are of necessity once again the chosen people of the terrible God of Exodus from the land of bondage.

"On the Conversations of Lords," New Monthly Magazine (April 1826)
Men and Manners: Sketches and Essays (1852)

On whether to hold a "vote of no confidence" in Attorney General Alberto Gonzales, as quoted in Dana Milbank, " A Jolly Good Show, but the Wrong Side of the Pond http://www.washingtonpost.com/wp-dyn/content/article/2007/06/11/AR2007061102092.html" The Washington Post 2007-06-12.
2000s

The Elements: A Visual Exploration of Every Known Atom in the Universe p. 233