“I was not speaking of minor ripples in the mainstream of history—certainly those are ruled by chance. But the broad current moves quite inexorably, I assure you.”

On appointment as President of Yale University, as quoted in The New York Tribune (14 October 1963)

"Nick Lowe" interview with Noel Murray at the A.V. Club (27 June 2007)

letter a friend September 21, 1878 reflecting on his election loss Buckingham page 518

On the neo-renaissance pile in the centre of Berlin, which he created as a challenge and an inspiration.

Inscribed on the Robert F. Kennedy gravesite at Arlington National Cemetery
Day of Affirmation Address (1966)

Siri
Warbreaker (2009)

In a letter to Sir Seymour Hicks (December 1910)

The comic part of the character I might be equal to, but not the good, the enthusiastic, the literary. Such a man's conversation must at times be on subjects of science and philosophy, of which I know nothing; or at least be occasionally abundant in quotations and allusions which a woman who, like me, knows only her own mother-tongue, and has read little in that, would be totally without the power of giving. A classical education, or at any rate a very extensive acquaintance with English literature, ancient and modern, appears to me quite indispensable for the person who would do any justice to your clergyman; and I think I may boast myself to be, with all possible vanity, the most unlearned and uninformed female who ever dared to be an authoress.
Letter to Mr. Clarke, librarian to the Prince Regent (1815-12-11) [Letters of Jane Austen -- Brabourne Edition]
Letters

Attributed without citation in "Tigran Petrosian's Best Games" http://www.chessgames.com/perl/chesscollection?cid=1014968 at chessgames.com