“I had learnt from experience that many false opinions may be exchanged for true ones, without in the least altering the habits of mind of which false opinions are made.”

The Westminster Review, vol. 6 (1826), p. 13
Context: This habit of forming opinions, and acting upon them without evidence, is one of the most immoral habits of the mind.... As our opinions are the fathers of our actions, to be indifferent about the evidence of our opinions is to be indifferent about the consequences of our actions. But the consequences of our actions are the good and evil of our fellow-creatures. The habit of the neglect of evidence, therefore, is the habit of disregarding the good and evil of our fellow-creatures.

Les fausses opinions ressemblent à la fausse monnaie qui est frappée d'abord par de grands coupables et dépensée ensuite par d'honnêtes gens qui perpétuent le crime sans savoir ce qu'ils font.
Les soirées de Saint-Pétersbourg, Ch. I

CVI.
Caelica (1633)

Thoughts on Various Subjects from Miscellanies (1711-1726)

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 440.

“What is liberal education,” p. 8
Liberalism Ancient and Modern (1968)

Pan Wen-chung (2019) cited in " Chinese students urged to cherish, respect freedom of speech http://focustaiwan.tw/news/acs/201910020009.aspx" on Focus Taiwan, 2 October 2019

Ich bin nicht nur überzeugt, dass das, was ich sage, falsch ist, sondern auch das, was man dagegen sagen wird. Trotzdem muss man anfangen, davon zu reden. Die Wahrheit liegt bei einem solchen Gegenstand nicht in der Mitte, sondern rundherum wie ein Sack, der mit jeder neuen Meinung, die man hineinstopft, seine Form ändert, aber immer fester wird!
Helpless Europe (1922)

Source: Northanger Abbey