“This error of free will is a special doctrine of the Antichrist.”

The Obedience of A Christian Man (1528)
Context: The preaching of God’s word is hateful and contrary unto them. Why? For it is impossible to preach Christ, except thou preach against antichrist; that is to say, them which with their false doctrine and violence of sword enforce to quench the true doctrine of Christ. And as thou canst heal no disease, except thou begin at the root; even so canst thou preach against no mischief, except thou begin at the bishops.

From Viva La Bam

Source: Economic Philosophy (1962), p. 79
Context: Progress is slow partly from mere intellectual inertia. In a subject where there is no agreed procedure for knocking out errors, doctrines have a long life. A professor teaches what he was taught, and his pupils, with a proper respect and reverence for teachers, set up a resistance against his critics for no other reason than that it was he whose pupils they were.

"Religion: A Dialogue."
Variant translation: To free a man from error does not mean to take something from him, but to give him something.
Essays
Source: Essays and Aphorisms
Context: To free a man from error is to give, not to take away. Knowledge that a thing is false is a truth. Error always does harm; sooner or later it will bring mischief to the man who harbors it. Then give up deceiving people; confess ignorance of what you don't know, and leave everyone to form his own articles of faith for himself. Perhaps they won't turn out so bad, especially as they'll rub one another's corners down, and mutually rectify mistakes. The existence of many views will at any rate lay a foundation of tolerance. Those who possess knowledge and capacity may betake themselves to the study of philosophy, or even in their own persons carry the history of philosophy a step further.

Source: The Production of Security (1849), p. 24
Context: But why should there be an exception relative to security? What special reason is there that the production of security cannot be relegated to free competition? Why should it be subjected to a different principle and organized according to a different system?

(Che) l’alma sciolta dal mondano errore
Tanto più sente, quanto è più felice;
E tant’ha più d’amor, quanto più intende.
La Bella Mano (Ed. Vinegia, 1531), p. 19.
Translation reported in Harbottle's Dictionary of quotations French and Italian (1904), p. 330.

"On The Natural Inequality of Men" (January 1890)
1890s

1963, Address at the Free University of Berlin