“The man of frank and strong prejudices, far from being a political and social menace and an obstacle in the path of progress, is often a benign character and helpful citizen. The chance is far greater, furthermore, that he will be more creative than the man who can never come to more than a few gingerly held conclusions, or who thinks that all ideas should be received with equal hospitality. There is such a thing as being so broad you are flat.”

Il n'y a point de gens qui aient plus souvent tort que ceux qui ne peuvent souffrir d'en avoir.
Maxim 386.
Reflections; or Sentences and Moral Maxims (1665–1678)

volume I, chapter VIII: "Religion", page 312 http://darwin-online.org.uk/content/frameset?pageseq=330&itemID=F1452.1&viewtype=image
The Life and Letters of Charles Darwin (1887)

"The Limits of Liberty," http://spectator.org/42528_back-basics/ The American Spectator (December 2008).

Reported in "Shirley Chisholm Kicks Off Campaign for U.S. Presidency" by Ronald E. Kisner, Jet‎, Vol. 41, no. 20 (Feb. 1972), p. 12.

Memorial dedication (1902)

Period I To the Revival of Letters in Erope
The History and Present State of Discoveries Relating to Vision, Light, and Colours (1772)
Context: Great as Bacon was, he was far from being free from the mistakes and prejudices of those who went before him. Even some of the most wild and absurd opinions of the antients have the sanction of his approbation and authority. He does not hesitate to assent to an opinion... that visual rays proceed from the eye; giving this reason for it, that every thing in nature is qualified to discharge its proper functions by its own powers, in the same manner as the sun, and other celestial bodies. He acknowledges, however, that the presence of light, as well as several other circumstances, is necessary to vision.

Einen Menschen verstehen heißt also: auch er sein. Der geniale Mensch aber offenbarte sich an jenen Beispielen eben als der Mensch, welcher ungleich mehr Wesen versteht als der mittelmäßige. Goethe soll von sich gesagt haben, es gebe kein Laster und kein Verbrechen, zu dem er nicht die Anlage in sich verspürt, das er nicht in irgend einem Zeitpunkte seines Lebens vollauf verstanden habe. Der geniale Mensch ist also komplizierter, zusammengesetzter, reicher; und ein Mensch ist um so genialer zu nennen, je mehr Menschen er in sich vereinigt, und zwar, wie hinzugefügt werden muß, je lebendiger, mit je größerer Intensität er die anderen Menschen in sich hat.
Source: Sex and Character (1903), p. 106.

The Value of Science (1955)

“English Aphorists,” p. 123
Reperusals and Recollections (1936)