“The Senator from South Carolina has read many books of chivalry, and believes himself a chivalrous knight, with sentiments of honor and courage. Of course he has chosen a mistress to whom he has made his vows, and who, though ugly to others, is always lovely to him; though polluted in the sight of the world, is chaste in his sight I mean the harlot, Slavery. For her, his tongue is always profuse in words.”
"The Crime against Kansas," speech in the Senate (May 18, 1856). The claims made against Senator Andrew Butler of South Carolina so angered Butler's cousin, Democrat Representative Preston Brooks, that Brooks assaulted Sumner with a cane in the Senate chamber a few weeks later
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Charles Sumner 16
American abolitionist and politician 1811–1874Related quotes

“For he who reckons it a pleasure that a man, though justly condemned, should be slain in his sight, pollutes his conscience as much as if he should become a spectator and a sharer of a homicide which is secretly committed.”
Nam qui hominem, quamuis ob merita damnatum, in conspectu suo iugulari pro uoluptate computat, conscientiam suam polluit, tam scilicet, quam si homicidii, quod fit occulte, spectator et particeps fiat.
Book VI, Chap. XX
The Divine Institutes (c. 303–13)

“He who has a false hope, has not that sight of his own corruptions which the saint has.”
Jonathan Edwards, A Treatise Concerning Religious Affections (1746), PART II : Showing What Are No Certain Signs That Religious Affections Are Truly Gracious, Or That They Are Not, Ch. 11: Nothing can be certainly known of the nature of Religious Affections, that they much dispose persons with their mouths to praise and glorify God. <!-- (1831 edition), p. 194, also in Complete Christian Classics (1999), Vol. 1, p. 365 -->
Context: !-- He who has a false hope, has not that sight of his own corruptions which the saint has. A true Christian has ten times more to do with his heart and its corruptions, than a hypocrite: and the sins of his heart and practice, appear to him in their blackness; they look dreadful; and it often appears a very mysterious thing, that any grace can be consistent with such corruption, or should be in such a heart. But a false hope hides corruption, covers it all over, and the hypocrite looks clean and bright in his own eyes.
--> There are two sorts of hypocrites: one that are deceived with their outward morality and external religion; many of which are professed Arminians, in the doctrine of justification: and the other, are those that are deceived with false discoveries and elevations; which often cry down works, and men's own righteousness, and talk much of free grace; but at the same time make a righteousness of their discoveries, and of their humiliation, and exalt themselves to heaven with them. These two kinds of hypocrites, Mr. Shepard, in his Exposition of the Parable of the Ten Virgins, distinguishes by the names of legal and evangelical hypocrites; and often speaks of the latter as the worst. And it is evident that the latter are commonly by far the most confident in their hope, and with the most difficulty brought off from it: I have scarcely known the instance of such a one, in my life, that has been undeceived.

Samuel Johnson in The Rambler no. 148 (17 August 1751).
Misattributed

Un Art de Vivre (The Art of Living) (1939), The Art of Happiness
4 Burr. Part IV., 2379.
Dissenting in Millar v Taylor (1769)

[Morgan, Forrest, Shakespeare—the Man, published in the Prospective Review, July 1853, The works of Walter Bagehot, vol. 1, 1891, Hartford, Connecticut, Travelers Insurance Company, https://babel.hathitrust.org/cgi/pt?id=njp.32101064786716;view=1up;seq=373, 265–266 of 255–302]
Shakespeare—the Man (1853)

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 130.
Phaedrus by Plato, as translated in the novel, p. 104
The Charioteer (1953)