“It is no less ancient than a pestilent error wherewith many men (but they chiefly who abound in power and riches) persuade themselves, or (as I think more truly) go about to persuade, that right and wrong are distinguished not according to their own nature but by a certain vain opinion and custom of men.”

Prefatory Address, p. 23
Institutes of the Christian Religion (1536; 1559)

The Other World (1657)
Context: Most men judge only by their senses and let themselves be persuaded by what they see. Just as the man whose boat sails from shore to shore thinks he is stationary and that the shore moves, men turn with the earth under the sky and have believed that the sky was turning above them. On top of that, insufferable vanity has convinced humans that nature has been made only for them, as though the sun, a huge body four hundred and thirty-four times as large as the earth, had been lit only to ripen our crab apples and cabbages.
I am not one to give in to the insolence of those brutes. I think the planets are worlds revolving around the sun and that the fixed stars are also suns that have planets revolving around them. We can't see those worlds from here because they are so small and because the light they reflect cannot reach us. How can one honestly think that such spacious globes are only large, deserted fields? And that our world was made to lord it over all of them just because a dozen or so vain wretches like us happen to be crawling around on it? Do people really think that because the sun gives us light every day and year, it was made only to keep us from bumping into walls? No, no, this visible god gives light to man by accident, as a king's torch accidentally shines upon a working man or burglar passing in the street.

Introductory Remarks
Thoughts on African Colonization (1832)
Context: Is Error, though unwittingly supported by a host of good men, stronger than Truth? Are Right and Wrong convertible terms, dependant upon popular opinion? Oh no! Then I will go forward in the strength of the Lord of Hosts — in the name of Truth — and under the banner of Right. As it is not by might nor by power, but by the Spirit of God, that great moral changes are effected, I am encouraged to fight valiantly in this good cause, believing that I shall "come off conqueror, and more than conqueror" — yet not I, but Truth and Justice. It is in such a contest that one shall chase a thousand, and two put ten thousand to flight.

The Principles of Success in Literature (1865)
Context: An orator whose purpose is to persuade men must speak the things they wish to hear; an orator, whose purpose is to move men, must also avoid disturbing the emotional effect by any obtrusion of intellectual antagonism; but an author whose purpose is to instruct men, who appeals to the intellect, must be careless of their opinions, and think only of truth. It will often be a question when a man is or is not wise in advancing unpalateable opinions, or in preaching heresies; but it can never be a question that a man should be silent if unprepared to speak the truth as he conceives it. Deference to popular opinion is one great source of bad writing, and is all the more disastrous because the deference is paid to some purely hypothetical requirement. When a man fails to see the truth of certain generally accepted views, there is no law compelling him to provoke animosity by announcing his dissent. He may be excused if he shrink from the lurid glory of martyrdom; he may be justified in not placing himself in a position of singularity. He may even be commended for not helping to perplex mankind with doubts which he feels to be founded on limited and possibly erroneous investigation. But if allegiance to truth lays no stern command upon him to speak out his immature dissent, it does lay a stern command not to speak out hypocritical assent.

Source: Meditations

"1896", p. 20
A Writer's Notebook (1946)

" Everyone Has Property Rights Whether He Knows It Or Not https://mises.org/blog/everyone-has-property-rights-whether-they-know-it-or-not," Mises Wire, October 11, 2017.
2010s, 2017

The First Part, Chapter 13, p. 61
Leviathan (1651)