“Censure pardons the raven, but is visited upon the dove.”

Phrixus, Frag. 970

The Earthly Paradise (1868-70), Apology
Context: Folk say, a wizard to a northern king
At Christmas-tide such wondrous things did show,
That through one window men beheld the spring,
And through another saw the summer glow,
And through a third the fruited vines a-row,
While still, unheard, but in its wonted way,
Piped the drear wind of that December day.
So with this Earthly Paradise it is,
If ye will read aright, and pardon me,
Who strive to build a shadowy isle of bliss
Midmost the beating of the steely sea,
Where tossed about all hearts of men must be;
Whose ravening monsters mighty men shall slay,
Not the poor singer of an empty day.

Ante paucos quam occideretur menses cornix in Capitolino elocuta est: εσται πάντα καλως, nec defuit qui ostentum sic interpretaretur:
Nuper Tarpeio quae sedit culmine cornix,
"Est bene" non potuit dicere, dixit: "Erit."
Source: The Twelve Caesars, Domitian, Ch. 23

Björn of Brekkukot
Brekkukotsannáll (The Fish Can Sing) (1957)

Letter XXVIII (April 1820) Views of Society and Manners in America (1821)
Context: The Virginians are said to pride themselves upon the peculiar tenderness with which they visit the sceptre of authority on their African vassals. As all those acquainted with the character of the Virginia planters, whether American or foreigners, appear to concur in bearing testimony of their humanity, it is probable that they are entitled to the praise which they claim. But in their position, justice should be held superior to humanity; to break the chains would be more generous than to gild them; and whether we consider the interests of the master or the slave, decidedly more useful. To give liberty to a slave before he understands its value is, perhaps, rather to impose a penalty than to bestow a blessing; but it is not clear to me that the southern planters are duly exerting themselves to prepare the way for that change in the condition of their black populations which they profess to think not only desirable but inevitable.

A Hero of Our Time (1840; rev. 1841)

Source: Magic Bites

Lyrics, Make Yourself (1999)

As quoted in letter to Henry Ward Beecher, by Mark Twain.